Parking and Traffic Analysis Seattle, WA Prepared for: URS Corporation 1501 4th Avenue, Suite 1400 Seattle, WA 98101-1616 Mirai Transportation Planning & Engineering 11410 NE 122nd Way, Suite 320 Kirkland, WA 98034 Prepared by:
Table of Contents Executive Summary... 1 Introduction... 3 Existing Conditions... 3 Traffic Conditions... 3 Level of Service Traffic Operations... 4 Level of Service Traffic Operations... 5 Existing Level of Service... 5 Parking Supply... 6 Parking Demand Summer Conditions... 8 Parking Demand School Conditions... 10 Parking Demand Event Conditions... 12 Future Conditions: Impact of the Proposed Project... 15 Analysis Assumptions... 17 Future Traffic Conditions... 17 Future Level of Service... 18 Parking Demand Future Conditions... 18 Mitigation... 20 List of Tables Table 1. Summary of Proposed Parking Supply... 1 Table 2. Comparison of Parking Demand and Supply for School Day and Peak Events... 2 Table 3. Summary of Peak Hour Traffic Conditions... 2 Table 4. Level of Service Definitions... 5 Table 5. Existing (2007) LOS Results (School Year)... 6 Table 6. Summary of Changes to Parking Areas... 15 Table 7. Estimate of Future Peak Hour Trips Generated for 1,400 Students... 17 Table 8. Intersection Level of Service with Proposed Project... 18 Table 9. Estimate of Future Parking Demand and Supply at 1,400 Students... 20 Table 10. Estimate of Event Parking Demand and Supply at 1,400 Students... 20 Page i
List of Figures Figure 1. Existing Traffic Volumes... 4 Figure 2. Parking Supply at and Vicinity... 7 Figure 3. Summer Parking Utilization...9 Figure 4. School Year Parking Utilization... 11 Figure 5. Non-Event Parking Utilization (Friday Evening)... 13 Figure 6. Event Parking Utilization Football Game... 14 Figure 7. Proposed Site Plan for... 16 Figure 8. Future Peak Hour Traffic with 1400 Students... 19 Page ii
EXECUTIVE SUMMARY Mirai Transportation Planning and Engineering reviewed the parking and traffic impacts associated with the planned increase of the student population from 1,200 to 1,400 Ingraham High School. The following highlights the major findings of the study. Parking Supply The proposed project site plan would change the number of parking spaces on-site (within the campus parking lots) and off-site (along the school s frontage). Table 1 summarizes the proposed parking supply. The proposed project would provide 160 parking spaces on-campus, a net increase of 43 spaces. The project would also add 70 spaces along the school s frontage on Ashworth Avenue N and N 135th Street. Under an existing agreement with the Parks Department, up to 165 spaces are available in an adjoining lot along the northeast portion of the driveway. The school uses approximately 82 of these spaces on an average school day. As part of the proposed project, this parking would no longer be used by the school and the supply of this lot would be reduced to 131 spaces. Comparing the existing and the proposed parking supply, there would be a net gain of 31 spaces available for school parking. Table 1. Summary of Proposed Parking Supply Existing Proposed Change On-site Parking 117 160 43 Frontage Parking 0 70 70 Off-site Parking (Parks Department) 82 0-82 Total School Parking Supply 199 230 31 Parking Demand Field counts during the school year were used to determine the parking demand for the existing student population. During the school year, there are 184 spaces used by students, teachers and staff. is planning for a possible future increase from 1,200 to 1,400 students. The Institute for Transportation Engineer s Parking Generation (3rd edition) peak parking rate was used to estimate the impact of the additional students on parking demand. Table 2 compares the parking demand and supply for a typical school day and during a peak event such as a football game. Page 1
With the increase in students from 1,200 to 1,400 the typical school parking demand would increase by 56 spaces to 240 spaces. Thus, the effect of the proposed project and the increased student population increase is a net deficit of 10 parking spaces. During events, such as football games, the 1,400 student population would increase the parking demand by 41 spaces to a total of 287 spaces, creating a net deficit of 57 spaces. Table 2. Comparison of Parking Demand and Supply for School Day and Peak Events Existing (1200 Students) Proposed (1400 Students) Change School Day Parking Demand 184 240 56 Available Supply 199 230 31 School Day Surplus/Deficit 15-10 -25 Peak Event Parking Demand 246 287 41 Available Supply 282 230-52 Peak Event Surplus/Deficit 36-57 -93 Peak Hour Traffic s student population is expected to increase from 1,200 to 1,400 students in the future. The following summarizes the impact of the additional students on the school driveways and intersections during the school s afternoon peak hour. Table 3 summarizes the total, entering and exiting trips during the peak hour of a typical school day. Traffic at adjacent study intersections would continue to operate at acceptable conditions (LOS B or better) with the 1,400 student population. The proposed project would add 56 additional trips during the peak hour. The changes to the site plan would redistribute trips to the driveway serving the South parking lot on Ashworth Avenue N. Table 3. Summary of Peak Hour Traffic Conditions Existing (1200 Students) Proposed (1400 Students) Change Peak Hour Trips 108 164 56 Entering Trips 24 42 18 Exiting Trips 84 122 38 Page 2
Parking and Traffic Impact Analysis INTRODUCTION Mirai Transportation Planning and Engineering reviewed the parking and traffic impacts associated with development of and the planned increase of the student population from 1,200 to 1,400. Mirai reviewed existing conditions and estimated the future impacts with the proposed improvements. This project provides a supplement of previous analysis completed for the Building Excellence (BEX) II Draft and Final EIS. EXISTING CONDITIONS Mirai documented the existing traffic and parking conditions to understand the high school s impact on the surrounding street system and neighborhoods. Traffic counts were conducted at area intersections and school driveways during the school year. Parking data were collected prior to and after the beginning of the school year to identify differences in area parking demand. Traffic Conditions Traffic counts were collected by TC2.com, on Thursday, September 20, 2007. All traffic counts were conducted between 2 and 4 pm to capture the peak period of school activity. Traffic counts were collected at the following locations: West Driveway/Ashworth Avenue N N 135th Street/Burke Avenue N (North driveways - counted together) N 135th Street/Meridian Avenue N East Driveway/Meridian Avenue N Of the driveways measured, 108 school-related trips were recorded either entering or exiting the site during the peak hour. Traffic was not focused on a single driveway with about 44 percent of the traffic using the northern driveway onto N 135th Street, 33 percent using Meridian Avenue N (via the Parks Department lot) and 23 percent using the west driveway on Ashworth Avenue N. Figure 1 shows the traffic volumes during the school s afternoon peak hour. Page 3
Figure 1. Existing Traffic Volumes Page 4
Level of Service Traffic Operations Level of Service (LOS) is a measure of the quality of traffic operations at an intersection. LOS is described using an A to F scale, with LOS A representing minimal traffic delays and LOS F representing severe congestion and long delays. The LOS is determined by measuring the average control delay per vehicle. For all-way stops, an overall intersection LOS and delay is reported. For intersections with stop controls only on the minor streets, the LOS and delay reported reflects the worst individual movement of the study intersection. Table 4 describes the LOS for unsignalized intersections. Table 4. Level of Service Definitions Unsignalized Delay per Vehicle LOS Description (sec/veh) A Few or no delays 0-10 B Short traffic delays >10-15 C Average traffic delays >15-25 D Long traffic delays >25-35 E Very long traffic delays >35-50 F Extreme traffic delays with intersection capacity exceeded >50 Source: Highway Capacity Manual (HCM 2000, Transportation Research Board) Existing Level of Service The LOS calculations reflect the worst or peak volumes during the school day, approximately between 2 PM and 3 PM in the afternoon on a standard school day. The collected traffic data were entered into a Synchro (Version 6, Build 614) intersection analysis program to calculate the existing delay and LOS. The Synchro program uses a variety of traffic data to calculate the operation of an intersection, including: traffic counts, lane configurations, pedestrian volumes and type of intersection controls. Intersections operate at LOS A or B during the afternoon peak hour of the school day. Table 5 shows the results of the LOS analysis. The Synchro LOS analysis reports are found in the Appendix to this document. Page 5
Table 5. Existing (2007) LOS Results (School Year) # Intersection Level of Service/Average Delay School Peak Hour (2:00 to 3:00 PM) 1 West Driveway/Ashworth Avenue N A / 9.0 2 N 135th Street/Burke Avenue N (North driveway) A / 9.6 3 N 135th Street/Meridian Avenue N B / 12.5 4 East Driveway/Meridian Avenue N B / 10.2 Parking Supply Mirai conducted a count of parking spaces within the school campus and within the walking distance of campus along neighboring streets. Figure 2 identifies the number of legal parking spaces and parking controls along each block face. On-Campus There are three parking areas on campus. The east parking area is located to the east of the school and is served by a driveway on N 135th Street. There is also a lot to the south of the tennis courts and a five-space lot to the west with access on Ashworth Avenue N. The total parking supply on-campus is 117 parking spaces: East parking lot There are approximately 65 parking spaces within the school s property. South parking lot This parking area has 47 spaces. Auto Shop parking lot There are approximately 5 spaces located in this service lot just north of the school driveway on Ashworth Avenue N. Off-Campus The Parks Department has a 165 space lot parking area to the east of the campus property line. The School District and Parks Department currently have a shared-use agreement to allow high school parking on the lot. On average, 82 school vehicles are parked in this lot. This agreement is not assumed to continue and the parking analysis assumes loss of this area for both daily and special event use. Page 6
Figure 2. Parking Supply at and Vicinity Page 7
Neighboring Streets Mirai completed a parking supply analysis of streets within approximately 0.2 miles of the school entrance. The study area is bounded by NE 137th Street to the north, Ashworth Avenue NE to the east, NE 130th Street to the south and Bagley Avenue NE to the west. The intent of the parking supply analysis is to determine the number of spaces available and provide a base to determine parking occupancy rates. The parking supply follows the City of Seattle methodology used by the Department of Planning and Development (Client Assistance Memo #117). The analysis measures the length of the street edge available for parking; deducts from the measurement distances required from features such as driveways, intersections and fire hydrants; and then determines the number of legal parking spaces based on the remaining street lengths. Adjacent to the campus, on-street parking is not allowed along the east side of Ashworth Avenue N. A school bus loading zone extends along the south side of N 135th Street. Parking is allowed in the bus loading zone outside of the 7-9 AM and 1-3 PM restrictions. Parking along the north side of N 135th Street and the west side of Ashworth Avenue is restricted during school days between 8 AM and 5 PM. In the adjacent neighborhoods, parking is largely undefined. As a result, in some areas, vehicles may park completely off the edge of the paved road, while in other areas vehicles may park partially on the paved roadway. Parking control signs are sporadic and seem to respond to streets where issues have arisen. In other locations, there are private parking areas where the parking or driveways for private buildings eliminate the possibility of parking along the roadway s edge. Parking Demand Summer Conditions Parking demand is the number of spaces needed to serve a particular use. One measure that relates the parking demand to the supply is Parking Utilization. Parking utilization indicates how full parking is along a particular street or within a parking lot. The measure is calculated by dividing the number of occupied spaces by the parking supply. Parking demand can exceed the legal parking supply and parking utilization rates may exceed 100 percent in areas where parking is in high demand. Generally, parking utilization levels above 80 percent for on-street and above 95 percent for parking lots are considered fully-occupied. Mirai counted the number of parked vehicles during the early afternoon (1 to 2 pm) during the last week of August to indicate a baseline of parking demand during summer conditions when school is not in session. Figure 3 shows the parking utilization during summer conditions. On-Campus On-campus parking lots were not counted during the summer, but were assumed to be lightly used. Page 8
Figure 3. Summer Parking Utilization Page 9
Neighboring Streets Parking in the neighborhood areas surrounding the school was generally light during the summer. Parking on the streets immediately adjacent to the school was generally light with between 0 and 35 percent of spaces occupied. Streets where the parking utilization was 50 percent or more include: The south side of N 130th Street east of Meridian Avenue N The south side of N 133rd Street west of Meridian Avenue N Parking Demand School Conditions A second parking demand count was conducted during the third week of school in the early afternoon (1 to 2 pm). This count identified the parking demand during the school year within the campus parking lots and on neighboring streets. The on-campus lots were counted during subsequent field visits to confirm the results. Figure 4 identifies the parking utilization during the school year. On-Campus Overall, parking in the school lots is approximately 157 percent of capacity (184/117) during the school year. Observed parking on the campus varied between 65 percent utilization of spaces in the east parking area to more than 100 percent utilization around the auto shop (west parking area). Approximately 82 vehicles park in spaces owned by the Parks Department in the adjoining lot. The south parking area was 97 percent utilized with 46 out of the 47 spaces occupied. We observed that many of the vehicles were not parked in the paved and striped parking area, with drivers preferring to park along access roads or unpaved areas closer to their destinations. The west parking area was 280 percent utilized, with most of the 14 vehicles parked in non-designated areas. Overall, 184 parking spaces were used by students and staff. Based on an existing population of 1,200 students, this translates to a peak parking demand of 0.15 spaces per student (184/1,200). Page 10
Figure 4. School Year Parking Utilization Page 11
Neighboring Streets Parking demand during a typical school day seems to be largely handled on campus and has only a minimal impact on adjacent neighborhood areas. Compared with the summer parking conditions, our analysis of school conditions in the neighborhood areas found: A small increase (from approximately 10 percent to 33 percent) in parking utilization on N 131st Street and the southern portion of Ashworth Avenue N. An increase from 37 to 50 percent utilization along Meridian Avenue N. The results indicate that the campus parking lots accommodate the school s parking demand during the typical day with little impact to adjacent neighborhood streets. Parking Demand Event Conditions Parking during high school events, such as football games, could overwhelm the parking provided on a high school s campus resulting in impacts to adjacent neighborhoods. Mirai collected parking data on two Friday evenings, a non-football game night September 21, 2007 and the homecoming football game on September 28, 2007 to assess the potential parking impact on adjacent neighborhoods caused by events. On the non-game night, there are few parking spaces occupied on-campus. In the surrounding neighborhoods, the parking utilization is 0 to 50 percent, mainly due to residential parking needs. Figure 5 shows the non-game Friday evening parking utilization for the high school and the surrounding neighborhoods. On the football night, parking availability becomes tighter, with the parking closest to the football fields being the highest. In the south parking area, the parking area is overflowing, with vehicles informally parked on grass areas, along access roads and next to buildings not usually used for parking. All on-campus parking areas are nearly fully occupied. Neighborhood areas appear not to be impacted with the exceptions noted below. Figure 6 shows parking utilization for the high school and the surrounding neighborhoods during a Friday evening football game. Areas with high utilization include: The south and auto shop parking areas are well over 100 percent utilized. Parking in the east lot is nearly 100 percent utilized. The school bus loading zone along N 135th Street is about 60 percent utilized. Parking along the west side of Ashworth Avenue N is 100 percent utilized. Parking along the north side of N 133rd Street, west of Meridian Avenue N is 81 percent utilized. Page 12
Figure 5. Non-Event Parking Utilization (Friday Evening) Page 13
Figure 6. Event Parking Utilization Football Game Page 14
FUTURE CONDITIONS: IMPACT OF THE PROPOSED PROJECT as currently configured could accommodate 1,400 students within the school site. The proposed project, part of the District s Building Excellence program, would replace 9 classrooms and formalizes the site s layout, including parking areas. Figure 7 shows the proposed site plan. Table 6 summarizes proposed changes to the parking areas: A total of 160 parking spaces would be provided in the campus parking lots. South parking lot This parking area would have 138 spaces for students and staff.. East parking area This parking area would have 22 spaces reserved for staff and parent pick-up. Auto Shop parking area This area would be gated and fenced. Ashworth Avenue N frontage parking 26 on-street parking spaces would be striped along Ashworth Avenue. N 135th Street frontage parking Currently, this is restricted parking during school hours to provide a school bus loading zone. The project would convert the loading zone to 44 spaces along N 135th Street. Overall, the project would provide 160 on-site and 70 on-street parking spaces. A total of 113 new spaces would be created by this project. Deducting for the loss of the 82 parking spaces on the Parks Department property, there is a net gain of 31 spaces. Table 6. Summary of Changes to Parking Areas Existing Proposed Change South Parking 47 138 91 East Parking 65 22-43 Auto Shop Parking 5 0-5 Total On-Campus 117 160 43 Ashworth Ave N Frontage 0 26 26 N 135th St Frontage 0 44 44 School Parking including Frontage 117 230 113 Parks Department Spaces 82 0-82 Total Parking 199 230 31 Page 15
Figure 7. Proposed Site Plan for Page 16
Analysis Assumptions Mirai investigated how these changes in parking would meet the anticipated student and staff demand and would affect the traffic operations at the study intersections. To estimate future traffic and parking demand, the study included the following assumptions: The existing (1,200 students) population would retain the current demand profile for parking facilities and for automobile trips. We do not anticipate a change in the commuting habits of this population. The existing trip rate is 0.10 trips per student during the peak hour of school activity. The peak school trip generation rate for suburban high schools in the Institute for Transportation Engineers (ITE) Trip Generation Manual (2003) is 0.28 trips per student. The trips associated with the 200 additional students are assumed at the ITE Trip Generation rates. This will provide a conservative estimate of the future travel demand at the school. Daily trips are based on the ITE Trip Generation Manual. A 1.0 percent growth rate on area roadways to reflect traffic increases. Review of City traffic data indicates that recent annual traffic growth in the area is approximately 0.7 percent annually. Growth rates were applied to non-school related traffic volumes for two years to reflect the near-term future traffic conditions. No roadway or intersection improvements are assumed. Future Traffic Conditions Future traffic conditions assume that area traffic growth increases at an average of 1 percent per year and 200 new students will be added to the population of. Table 7 shows the estimated peak hour and daily trips for the future student population. Table 7. Estimate of Future Peak Hour Trips Generated for 1,400 Students Entering Trips Exiting Trips Students Trip Rate Total Trips Afternoon Peak Hour Existing Conditions 1,200 0.10 114 30 84 Additional Students/Staff 200 0.28 56 18 38 Future Conditions 1,400 164 42 122 Daily Existing Conditions 1,200 1.71 2,052 1,026 1,026 Additional Students/Staff 200 1.71 342 171 171 Future Conditions 1,400 1.71 2,394 1,197 1,197 The additional student trips were assigned to the study intersections based on the location of future parking and current trip patterns. Figure 8 shows the future traffic volumes. The future volumes were calculated by multiplying the 1 percent growth factor to the existing Page 17
traffic volumes for two years (non-school related) and then adding the new trips generated by the additional student population. Future Level of Service The future traffic operations at the study intersections are acceptable, with all driveways operating at LOS B or better. Table 8 compares the existing and future with project LOS for each of the study intersections. The future distribution of traffic to the site would change to reflect the location and size of the parking facilities. The East Driveway/Meridian Avenue N intersection (currently accessible to the campus through the Parks Department parking area) is assumed to be gated during school hours and would no longer serve school trips. The existing trips at this location were reassigned to the North and West driveways based on the number of parking spaces and the location of pick-up/drop-off area. Table 8. Intersection Level of Service with Proposed Project Intersection Existing Level of Service/Average Delay (1200 students) Future Level of Service/Average Delay (1400 students) West Driveway/Ashworth Avenue N A / 9.0 B / 10.2 N 135th Street/Burke Avenue N (north driveway) A / 9.6 A / 10.0 N 135th Street/Meridian Avenue N B / 12.5 B / 13.6 East Driveway/Meridian Avenue N B / 10.2 --- Parking Demand Future Conditions The estimate of future parking demand followed the methodology used in the traffic analysis. Mirai estimated the future parking demand based on the increase in the student population at. The evaluation looks at the parking demand during a typical school day and for an event, such as a football game. School Day Parking Demand The parking demand for the existing student population was assumed to be captured in the field results (184 spaces). The parking demand for the additional 200 students was estimated using the ITE Parking Generation (3rd Edition) average demand rates for suburban schools. The analysis showed that 56 additional parking spaces would be required to meet the future peak parking demand. For the future population of 1,400 students, the peak parking demand would be 240 spaces (184+56). Table 9 summarizes the peak parking demand calculation for the proposed student population. Page 18
Figure 8. Future Peak Hour Traffic with 1400 Students Page 19
Table 9. Estimate of Future Parking Demand and Supply at 1,400 Students Students Peak Demand Rate Peak Parking Demand Existing Peak Demand 1200 0.15 184 Additional Student/Staff Demand 200 0.28 56 Total Future Demand 1400 240 The proposed project would provide 160 on-site spaces and an additional 70 spaces along the school s frontage on Ashworth Avenue N and N 135th Street, a total of 230 spaces, resulting in a deficit of ten (-10) parking spaces. Event Parking Demand For events, such as football games, the parking demand would likely increase by a proportionate amount with the addition of 200 students. Based on the parking survey, the parking demand related to a football game is 246 vehicles. At 1,400 students, the demand would be expected to increase to 287 vehicles, an increased demand for 41 spaces. Table 10 provides an estimate of event parking demand with the additional students. Table 10. Estimate of Event Parking Demand and Supply at 1,400 Students Students Event Parking Demand Parking Supply Existing Event 1200 246 117 Increase 200 41 43 Total Future 1400 287 160 As it is today, the demand for football parking would not be distributed evenly, with parking utilization rates above 100% in areas closest to the athletic fields. Nearby on-street parking would likely be used, as well as portions of the parking created along Ashworth Avenue N and N 135th Street. Other events, such as activities in the school s auditorium, may have higher parking demand in the north lot and along N 135th Street. Mitigation The proposed project would expand the amount of parking provided on-campus and provide additional on-street parking along the school s frontage. The proposed project would increase the number of on-campus parking spaces from 117 to 160 spaces and would add 70 on-street parking spaces along the N 135th Street and Ashworth Avenue N frontages. With a 1,400 student population, there would be a deficit of 10 parking spaces during a typical school day. There is adequate parking within walking distance (less than 50 Page 20
percent occupied) along adjacent streets to accommodate this overflow. To offset this on-site deficit the following mitigation is proposed. Promote transportation and parking management strategies to promote student use of public transit, ridesharing, walking and bicycling and to control off-site parking impacts. If daily parking needs are not met, investigate the potential for shared parking with nearby uses. Work with the neighborhoods to identify student parking impacts on residential streets. Coordinate with the City of Seattle to control and enforce on-street parking impacts in the adjacent neighborhoods as required. Page 21
APPENDIX
Ingraham HS Existing counts INTID NBL NBT NBR SBL SBT SBR EBL EBT EBR WBL WBT WBR West Dvwy/Ashworth 1 50 6 2 76 8 28 North Dvwy/135th 2 12 4 23 2 2 7 33 3 3 18 N 135th/Meridian Av 3 13 177 6 2 127 6 19 7 28 7 6 2 East Dvwy/Meridian Av 4 10 194 152 6 2 7 Existing school trips INTID NBL NBT NBR SBL SBT SBR EBL EBT EBR WBL WBT WBR West Dvwy/Ashworth 1 6 2 8 28 North Dvwy/135th 2 12 4 23 2 14 3 2 1 N 135th/Meridian Av 3 2 2 6 1 13 5 19 East Dvwy/Meridian Av 4 10 2 19 6 2 7 Existing without NHHS trips INTID NBL NBT NBR SBL SBT SBR EBL EBT EBR WBL WBT WBR West Dvwy/Ashworth 1 0 50 0 0 76 0 0 0 0 0 0 0 North Dvwy/135th 2 0 0 0 0 0 2 7 19 0 1 17 0 N 135th/Meridian Av 3 11 175 6 2 121 5 6 2 9 7 6 2 East Dvwy/Meridian Av 4 0 192 0 0 133 0 0 0 0 0 0 0 Background growth Years 2 Growth factor 1.0% INTID NBL NBT NBR SBL SBT SBR EBL EBT EBR WBL WBT WBR West Dvwy/Ashworth 1 0 51 0 0 78 0 0 0 0 0 0 0 North Dvwy/135th 2 0 0 0 0 0 2 7 19 0 1 17 0 N 135th/Meridian Av 3 11 179 6 2 123 5 6 2 9 7 6 2 East Dvwy/Meridian Av 4 0 196 0 0 136 0 0 0 0 0 0 0 Additional trips @1400 students INTID NBL NBT NBR SBL SBT SBR EBL EBT EBR WBL WBT WBR West Dvwy/Ashworth 1 8 8 3 8 8 0 26 North Dvwy/135th 2-5 -2-9 -1 44-2 -1 5 N 135th/Meridian Av 3-1 -2-1 5 12 5 18 East Dvwy/Meridian Av 4-1 -1 18-1 -2 0-5 0 Total Volume @1400 students INTID NBL NBT NBR SBL SBT SBR EBL EBT EBR WBL WBT WBR West Dvwy/Ashworth 1 0 59 14 5 86 0 0 0 0 16 0 54 North Dvwy/135th 2 7 2 14 0 1 2 7 77 1 2 23 0 N 135th/Meridian Av 3 12 179 6 2 128 11 31 12 46 7 6 2 East Dvwy/Meridian Av 4 9 197 0 0 173 5 0 0 2 0 0 0 Total School Trips @ 1400 students+a3 INTID NBL NBT NBR SBL SBT SBR EBL EBT EBR WBL WBT WBR West Dvwy/Ashworth 1 0 8 14 5 8 0 0 0 0 16 0 54 North Dvwy/135th 2 7 2 14 0 1 0 0 58 1 1 6 0 N 135th/Meridian Av 3 1 0 0 0 5 6 25 10 37 0 0 0 East Dvwy/Meridian Av 4 9 1 0 0 37 5 0 0 2 0 0 0 Assignment of Future Trips to School Driveways Change in Parking Current Assumed Future Avail Future Area Parking Utilztn Supply Spaces Trips Entering Exiting West/Main 52 115% 128 68 44 10 34 North 160 45% 39-33 -21-5 -16 East 73 20% 0-15 -9-2 -7 Frontage 0 0 67 67 43 10 33 Total 285 234 88 57 13 44 Trip Assignment-Volumes for 1400 students.xls
Prepared for: Mirai TP&E Traffic Count Consultants, Inc. Intersection: Ashworth Ave N @ Ingram HS Dwy Location: Ingram HS, Seattle Phone: (425) 861-8866 FAX: (425) 861-8877 E-Mail: TC2inc@aol.com WBE/DBE Date of Count: Thurs 9/20/07 Checked By: LBP Time Interval Ending at 2:15 P 2:30 P 2:45 P 3:00 P 3:15 P 3:30 P 3:45 P 4:00 P 4:15 P 4:30 P 4:45 P 5:00 P From North on (SB) Ashworth Ave N From South on (NB) Ashworth Ave N From East on (WB) Ingram HS Dwy From West on (EB) Ingram HS Dwy Interval Total T L S R T L S R T L S R T L S R 2 1 30 0 0 0 13 1 0 6 0 3 0 0 0 0 54 0 0 18 0 0 0 13 0 0 8 0 2 0 0 0 0 41 1 1 14 0 1 0 12 2 0 2 0 5 0 0 0 0 36 1 0 14 0 0 0 12 3 0 1 0 1 0 0 0 0 31 1 2 12 0 0 0 22 1 0 7 0 2 0 0 0 0 46 2 0 14 0 2 0 11 2 0 2 0 1 0 0 0 0 30 0 0 4 0 0 0 8 1 0 1 0 0 0 0 0 0 14 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total Survey 7 4 106 0 3 0 91 10 0 27 0 14 0 0 0 0 252 Peak Hour: 2:00 PM to 3:00 PM Total 4 2 76 0 1 0 50 6 0 17 0 11 0 0 0 0 162 Approach 78 56 28 0 162 %HV 5.1% 1.8% n/a n/a 3.1% PHF 0.63 0.93 0.70 n/a 0.75 Ashworth Ave N 139 78 61 1 Bike Ingram HS Dwy 76 2 0 Ped Ingram HS Dwy 11 0 Ped 0 28 Bike 17 36 0 0 Bike 0 2:00 PM to 3:00 PM 3 Ped 8 PEDs across N S E W Ped 0 0 50 6 216 1.0 PHF Peak Hour Volume INT 01 0 Bike 0 PHF %HV INT 02 1 1 EB n/a n/a INT 03 0 93 56 Check WB 0.70 n/a INT 04 2 2 In: 162 NB 0.93 1.8% INT 05 5 12 17 149 Out: 162 SB 0.63 5.1% INT 06 4 5 9 Ashworth Ave N Intersection 0.75 3.1% INT 07 2 2 Bicycles From: N S E W BUS N BUS S BUS E BUS W INT 08 1 1 INT 01 0 INT 09 0 INT 02 0 INT 10 0 INT 03 0 1 INT 11 0 INT 04 1 1 1 INT 12 0 INT 05 0 1 0 9 23 0 32 INT 06 0 INT 07 0 INT 08 0 1 0 0 0 1 TM40p07162
Prepared for: Mirai TP&E Traffic Count Consultants, Inc. Phone: (425) 861-8866 FAX: (425) 861-8877 Intersection: North Dwys / Burke Ave N @ N 135th St Location: Ingram High School, Seattle E-Mail: TC2inc@aol.com WBE/DBE Date of Count: Thur 9/20/07 Checked By: LBP Time Interval Ending at 2:15 P 2:30 P 2:45 P 3:00 P 3:15 P 3:30 P 3:45 P 4:00 P 4:15 P 4:30 P 4:45 P 5:00 P From North on (SB) Burke Ave N From South on (NB) HS Dwys From East on (WB) N 135th St From West on (EB) N 135th St Interval Total T L S R T L S R T L S R T L S R 0 0 1 1 0 0 0 1 0 0 11 0 4 2 9 0 25 0 0 0 1 0 1 1 4 0 1 3 0 12 5 18 0 34 0 0 1 0 0 9 2 9 0 1 4 0 0 0 2 2 30 0 0 0 0 0 2 1 9 0 1 0 0 0 0 4 1 18 0 1 0 0 0 0 2 3 0 2 2 0 0 0 2 0 12 0 0 0 0 0 6 0 1 0 0 4 0 0 0 1 1 13 0 0 0 1 0 2 0 5 0 2 6 0 0 1 13 0 30 0 0 0 1 0 2 0 5 0 0 3 0 0 0 6 0 17 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total Survey 0 1 2 4 0 22 6 37 0 7 33 0 16 8 55 4 179 Peak Hour: 2:00 PM to 3:00 PM Total 0 0 2 2 0 12 4 23 0 3 18 0 16 7 33 3 107 Approach 4 39 21 43 107 %HV n/a n/a n/a 37.2% 15.0% PHF 0.50 0.49 0.48 0.47 0.79 Burke Ave N 15 4 11 0 Bike N 135th St 2 2 0 0 Ped N 135th St 0 32 Ped 21 18 21 Bike 1 3 77 75 7 0 Bike 43 33 2:00 PM to 3:00 PM 0 Ped 56 3 PEDs across N S E W Ped 0 12 4 23 136 1.0 PHF Peak Hour Volume INT 01 0 Bike 0 PHF %HV INT 02 21 21 EB 0.47 37.2% INT 03 0 8 39 Check WB 0.48 n/a INT 04 0 In: 107 NB 0.49 n/a INT 05 0 47 Out: 107 SB 0.50 n/a INT 06 16 16 HS Dwys Intersection 0.79 15.0% INT 07 0 Bicycles From: N S E W BUS N BUS S BUS E BUS W INT 08 0 INT 01 0 3 INT 09 0 INT 02 0 12 INT 10 0 INT 03 0 1 INT 11 0 INT 04 1 1 INT 12 0 INT 05 0 2 0 16 0 21 37 INT 06 0 Buses & some autos were parked along N 135th @ 2:00 INT 07 0 2 21 peds boarded a bus across the street intv'l 2 INT 08 0 16 Cross country Runners intv'l 6 0 0 0 1 1 TM20p07162
Prepared for: Mirai TP&E Traffic Count Consultants, Inc. Intersection: N 135th St @ Meridian Ave N Location: Ingram HS, Seattle Phone: (425) 861-8866 FAX: (425) 861-8877 E-Mail: TC2inc@aol.com WBE/DBE Date of Count: Thurs 9/20/07 Checked By: LBP Time Interval Ending at 2:15 P 2:30 P 2:45 P 3:00 P 3:15 P 3:30 P 3:45 P 4:00 P 4:15 P 4:30 P 4:45 P 5:00 P From North on (SB) Meridian Ave N From South on (NB) Meridian Ave N From East on (WB) N 135th St From West on (EB) N 135th St Interval Total T L S R T L S R T L S R T L S R 1 2 19 2 0 2 10 1 0 2 4 1 3 6 3 4 56 0 1 23 2 0 0 17 0 0 2 1 1 13 3 13 7 70 1 1 30 2 1 3 14 0 0 1 2 1 0 2 3 3 62 0 0 26 1 1 3 37 1 0 3 1 0 0 4 0 9 85 1 2 27 2 2 5 34 5 2 2 0 1 0 4 0 8 90 1 0 35 0 1 0 43 1 0 1 4 1 0 4 1 4 94 1 0 26 2 1 4 48 0 0 3 1 0 0 7 2 10 103 1 0 39 2 1 4 52 0 0 1 1 0 0 4 4 6 113 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total Survey 6 6 225 13 7 21 255 8 2 15 14 5 16 34 26 51 673 Peak Hour: 3:00 PM to 4:00 PM Total 4 2 127 6 5 13 177 6 2 7 6 2 0 19 7 28 400 Approach 135 196 15 54 400 %HV 3.0% 2.6% 13.3% n/a 2.8% PHF 0.82 0.88 0.63 0.71 0.88 Meridian Ave N 333 135 198 0 Bike N 135th St 6 127 2 0 Ped N 135th St 2 25 Ped 3 6 15 Bike 0 7 30 79 19 0 Bike 54 7 3:00 PM to 4:00 PM 1 Ped 15 28 PEDs across N S E W Ped 5 13 177 6 452 1.0 PHF Peak Hour Volume INT 01 0 Bike 1 PHF %HV INT 02 0 EB 0.71 n/a INT 03 1 1 162 196 Check WB 0.63 13.3% INT 04 0 In: 400 NB 0.88 2.6% INT 05 1 1 358 Out: 400 SB 0.82 3.0% INT 06 1 1 Meridian Ave N Intersection 0.88 2.8% INT 07 1 2 3 Bicycles From: N S E W BUS N BUS S BUS E BUS W INT 08 3 1 4 INT 01 0 3 INT 09 0 INT 02 0 12 INT 10 0 INT 03 0 1 INT 11 0 INT 04 1 1 INT 12 0 INT 05 0 2 0 6 1 3 10 INT 06 1 1 INT 07 0 1 1 INT 08 0 0 1 0 1 2 TM10p07162
Prepared for: Mirai TP&E Traffic Count Consultants, Inc. Intersection: Meridian Ave N Location: Ingram HS, Seattle Phone: (425) 861-8866 FAX: (425) 861-8877 E-Mail: TC2inc@aol.com WBE/DBE Date of Count: Thur 9/20/07 Checked By: LBP Time Interval Ending at 2:15 P 2:30 P 2:45 P 3:00 P 3:15 P 3:30 P 3:45 P 4:00 P 4:15 P 4:30 P 4:45 P 5:00 P From North on (SB) Meridian Ave N From South on (NB) Meridian Ave N From East on (WB) Private Dwy From West on (EB) Ingram Dwy Interval Total T L S R T L S R T L S R T L S R 1 0 23 2 0 1 12 0 0 0 0 0 0 0 0 0 38 2 0 25 2 0 1 13 1 0 0 0 0 0 0 0 2 44 2 0 31 2 1 6 14 1 0 0 0 0 0 1 0 4 59 0 0 32 3 1 5 37 0 0 0 0 0 0 4 0 4 85 1 0 36 4 2 5 42 0 0 0 0 0 0 2 0 2 91 2 0 37 0 1 2 48 0 0 0 0 0 0 0 0 3 90 1 0 36 2 1 0 50 0 0 0 0 0 0 0 0 0 88 1 0 43 0 1 3 54 0 0 0 0 0 0 0 0 2 102 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total Survey 10 0 263 15 7 23 270 2 0 0 0 0 0 7 0 17 597 Peak Hour: 3:00 PM to 4:00 PM Total 5 0 152 6 5 10 194 0 0 0 0 0 0 2 0 7 371 Approach 158 204 0 9 371 %HV 3.2% 2.5% n/a n/a 2.7% PHF 0.92 0.89 n/a 0.56 0.91 Meridian Ave N 354 158 196 0 Bike Ingram Dwy 6 152 0 0 Ped Private Dwy 0 16 Ped 28 0 0 Bike 0 0 0 25 2 0 Bike 9 0 3:00 PM to 4:00 PM 0 Ped 0 7 PEDs across N S E W Ped 0 10 194 0 408 1.0 PHF Peak Hour Volume INT 01 2 2 Bike 1 PHF %HV INT 02 0 EB 0.56 n/a INT 03 1 1 159 204 Check WB n/a n/a INT 04 3 3 In: 371 NB 0.89 2.5% INT 05 10 10 363 Out: 371 SB 0.92 3.2% INT 06 7 7 Meridian Ave N Intersection 0.91 2.7% INT 07 1 1 Bicycles From: N S E W BUS N BUS S BUS E BUS W INT 08 10 10 INT 01 0 1 INT 09 0 INT 02 0 2 INT 10 0 INT 03 0 1 INT 11 0 INT 04 0 INT 12 0 INT 05 0 2 0 0 0 34 34 INT 06 1 1 INT 07 0 1 1 INT 08 0 0 1 0 0 1 TM30p07162