Project Advisory Committee - PDF Free Download

Meredith US 3/NH 25 Improvements Transportation Planning Study Project Advisory Committee March 18, 2008

Meredith US 3/NH 25 Improvements Transportation Planning Study Meeting Agenda Welcome Traffic Model Overview Break Traffic Analysis Alternatives Development Next Steps Adjourn

Meredith US 3/NH 25 Improvements Transportation Planning Study Traffic Model Overview Model Purpose Model Development Model Calibration Sample Scenarios Results Signal Timing Improvements

Why is this project using a travel model? Can evaluate land use or network changes Network changes can include: Intersection control changes New roadway connections Roadway expansions Land Use changes can include Revised zoning Future development projections Analysis accounts for regional impacts Method projects travel changes 4

Traffic Modeling Overview Approaches to traffic analysis Modeling tools 4-Step Travel Demand Model (emme/2, TransCAD, CUBE, QRS) Macrosimulation (SimTraffic) Microsimulation (CORSIM, Paramics, VISSIM) Congestion Analysis tools HCM Synchro aasidra All are sophisticated, each has its own purpose Illustrate travel patterns Evaluate new routing Evaluate capacity suitable for permitting 5

Meredith Paramics Model 9

What the model can & cannot tell us It is a very rigorous tool for getting good information about traveling routing, but the model should not supplant engineering insight. The model can provide reasonable estimates of impacts such as: Point to point travel times Travel speeds Traffic volumes Turning movements Queues Routing information Level of Service Data out only as good as data in. The model cannot provide THE answer only insight about potential options. 10

Traffic Simulation Model Construction Establish key characteristics including geographic scope and year of analysis Develop Transportation Analysis Zones (TAZs) Collect input data: Traffic Count Data Geometric Details Land Use information Construct model roadway network Estimate Origin-Destination traffic flows Calibrate model to collected traffic counts 11

Model Scope 13

Transportation Analysis Zones (TAZs) Designed to follow census geography zoning districts other relevant geography travel routing driveway directionality Used to establish Vehicle trip origins Vehicle trip destinations Trip generation 15

Traffic Count Effort 17

Traffic Count Data 18

Updated Pedestrian Counts (10/7 Columbus Day Weekend) Crosswalk North of Dover Street 8/18 (Friday) 10/7 (Saturday) Total Pedestrians (15 min) 26 63 # Groups 7 17 Avg. Crossing Time 12 seconds Total Stopped Time (in 15 minutes) 84 sec (9%) 204 sec (23%) 19

Land Use File Traffic generation is tied to employment, parking, and housing land use. Special generators take into account unique, identifiable uses like schools or hospitals. 20

Develop Model Roadway Network Exact roadway alignments Real-world signal timing Precise geometric specifications: Functional class Turning lanes Lane width 22

Origin-Destination Matrix Using data developed with the license plate study, traffic flows between TAZs are assigned. 24

Calibration Calibration ensures the model matches the observed traffic patterns. Uses national regional and simulation modeling standards. Calibration is necessary for model validity. GEH Statistics All intersections by link <5 5-->10 >10 99 33 15 67% 22% 10% Screenlines by link <4 <5 5-->10 >10 9 10 1 1 75% 83% 8% 8% Regional Modeling Statistics Value Goal RMSE 24% <40% Absolute Error 17% - Sum of Differences (Principal Arterials) 6% 10% Sum of Differences (Minor Arterials) 2% 15% Sum of Differences (Collectors) 1% 25% Coefficient of Correlation (r) 0.985 >= 0.88 Percent Error (Region) 6% +/- 5% Percent Error (Principal Arterials) 6% 10% Percent Error (Minor Arterials) 2% 15% Percent Error (Collectors) 1% 25% 26

Base Year Model Calibration Model is a numerical depiction - Model will not be exact - Errors must be documented and addressed This model is excellent at the US 3-NH 25 intersection. Side streets onto NH 104 and NH 25 are less well calibrated. Traffic volumes throughout the model err on the high side. Paramics Generated Volumes Adjusted Raw Counts: 2006 EB WB NB SB EB WB NB SB NH25-US3 LT 29 729 44 116 LT 60 663 36 158 Meredith, NH TH 284 265 229 235 TH 224 205 198 212 7/7/2006 RT 10 95 738 57 2,831 RT 66 97 806 60 2,785 1st Friday Enter 323 1,089 1,011 408 2,831 Enter 350 966 1,040 429 2,785 Exit 1,138 366 353 974 2,831 Exit 1,188 301 355 941 2,785 27

Sample Scenarios Roadway Designs Intersection Control Measures US 3 Bypass US 3-NH 25 US 3-NH 104 Bypass terminus No Build as is none as is as is none Future No Build as is none as is as is none Capacity Scenario 4-lane cross section none 2-lane 2-lane none Intermediate Scenario 3-lane cross section none 2-lane upgraded signal none School Bypass as is past school, 2-way 1-lane at as is as is traffic Barnard Ridge Intermediate Scenario w/2-lane w/o pedestrians Intermediate Scenario w/o pedestrians Pleasant Street Bypass: One-way Circulation Pleasant Street Bypass: One-way Circulation, extra right turn Roundabout Scenario, force Main Street use Roundabout Scenario Signal Scenario Reversible Lane School Bypass 3-lane cross section, no ped xings 3-lane cross section, no ped xings 3-lane cross section, no ped xings 3-lane cross section, no ped xings 3-lane cross section, ped cross at Dover 3-lane cross section, ped cross at Dover 3-lane cross section, ped cross at Dover 3-lane cross section, no ped xings 3-lane cross section, no ped xings none none opposite Pleasant St, 1-way WB opposite Pleasant St, 1-way WB none none 2-lane 1-lane 1-lane 1.5-lane 2-lane 2-lane upgraded signal upgraded signal 2-lane 2-lane 2-lane 2-lane none none 1-lane s at either end 1-lane s at either end none none none upgraded signal upgraded signal none none past school, 2-way traffic 2-lane 2-lane 2-lane upgraded signal none 1-lane, 2- lane 28

Meredith US 3/NH 25 Improvements Transportation Planning Study Capacity Scenario 2 Lane Roundabout 2 Lane Roundabout at Route 104/3 4 Lanes on Route 3 2 Lane Roundabout at Route 3/25 Pedestrian crosswalk at Lake Street Pedestrian crosswalk at Dover Street 4 Lanes Unreleased Vehicles 371 NB 1,477 2 Lane Roundabout Volume on Route 3 south of Route 25 Travel Time (min) Route 104 to Barnard Ridge Road SB 1,063 Total 2,540 NB 3:45 SB 4:15

2030 Capacity Alternative 31

Meredith US 3/NH 25 Improvements Transportation Planning Study 2 Lane Roundabout 1 Lane Roundabout (Lake St) Ped Signal 1 Lane Roundabout 1 Lane Roundabout 3 Lanes Roundabout Scenario 3-Lanes on US 3 6 Roundabouts (5 new & 1 existing) New Roundabouts at: - Route 104/3 (2 lanes) - Route 3/Lake Street - Route 3/25 (2 lanes) - Route 25/Pleasant Street - Route 25/Barnard Ridge Road Pedestrian Signal at Dover Street Unreleased Vehicles 1,730 NB 998 2 Lane Roundabout 1 Lane Roundabout (Existing) Volume on Route 3 south of Route 25 Travel Time (min) Route 104 to Barnard Ridge Road SB 1,421 Total 2,419 NB 9:00 SB 4:15

2030 Roundabout Scenario 33

Travel Time Results - Northbound 10:30 09:00 07:30 06:00 04:30 03:00 01:30 00:00 34 05 NB Future No Build Capacity 25 2-way 25 1-way, 2-lane rndbt BRR 3-Byp peds, 2-lane rndbt no peds, 1-lane rndbt no peds, 2-lane rndbt w/1-lane rndbt w/hybrid Rndbt NB Travel Time (min) Roundabout Scenario Signal Reversible Lane School Bypass Intermediate Pleasant St Bypass

Travel Time Results - Southbound 10:30 09:00 07:30 06:00 04:30 03:00 01:30 00:00 35 05 NB Future No Build Capacity 25 2-way 25 1-way, 2-lane rndbt BRR 3-Byp peds, 2-lane rndbt no peds, 1-lane rndbt no peds, 2-lane rndbt w/1-lane rndbt w/hybrid Rndbt SB Travel Time (min) Roundabout Scenario Signal Reversible Lane School Bypass Intermediate Pleasant St Bypass

3/25 Signal Timing 36

Signal Timing: US 3 / NH 25 / Main Street Intersection Signal currently running 1 timing plan, year-round (176-sec cycle length) Existing signal controller has capacity to accommodate a total of 2 timing plans. Programming the controller to run under coordination or installing a new controller would enable running additional timing plans. 37

Signal Timing: US 3 / NH 25 / Main Street Intersection Challenge: Develop Timing Plan to Improve Non-Summer Peak Traffic Flows 25,000 20,000 15,000 10,000 5,000 Peak Period 0 0Jan Feb 28 Mar 56 Apr 84 May 112 June 140 168 July Aug 196 Sept 224 252 Oct 280 Nov 308 Dec 38

Signal Timing: US 3 / NH 25 / Main Street Intersection Challenge: Develop Timing Plan to Improve Non-Summer Peak Traffic Flows Timings based on traffic counts conducted Thursday, November 17 th, 2007 AM Peak Hour EB WB NB SB LT 29 459 15 122 TH 110 104 117 121 RT 11 63 436 29 PM Peak Hour EB WB NB SB LT 35 621 30 96 TH 133 139 141 138 RT 32 118 570 54 39

Signal Timing: US 3 / NH 25 / Main Street Intersection Scenario 1: 1 new timing plan to run continuously during non-summer period. 110-second cycle length (current = 176 seconds) Minor adjustments to splits: N/S left turns ; N/S thrus ; Main St Improvements to average delay and queuing Scenario 2: 2+ additional timing plans for non-summer period. Cycle length: 100 AM; 115 PM Negligible additional improvements to delay and queuing 40

Signal Timing: US 3 / NH 25 / Main Street Intersection Queuing (feet): 450 PM Peak Hour 50th Percentile Queues 400 350 300 250 200 150 100 50 0 EBLT EBR WBL WBLTR NBL NBTT NBR SBL SBTTR Existing Scenario 1 Scenario 2 41

Signal Timing: US 3 / NH 25 / Main Street Intersection Delays (seconds): AM Peak Hour Delay (sec) 50 45 40 35 30 25 20 15 10 5 0 Overall EB, NH 25 WB, Main St from Water St NB, US 3 from NH 104 SB, US 3 from NH 25B Existing Scenario 1 Scenario 2 42

Future Year Land Use & Parking Trip Table Growth (2006-2030) (from Applied Economic Research) Future (2030) Condition Estimated Growth (# growth 2006-2030) Destinations Origins Employees Housing Units High Med Low Zone # Zone Name Retail Emp. Non-Retail Emp. SF Units MF Units Source: Town & LRPC Retail Non-Retail SF MF Source: Ortho, Town & LRPC 1 Boynton Road 0 15 100 0 0 15 150 0 0 0 0 2 Northwestern Lake Waukewan, public services 10 10 50 10 0 0 10 10 131 10 0 0 0 3 North of Boynton Road 0 0 0 0 0 0 10 0 0 0 0 4 Western Lake Waukewan 0 0 50 50 0 0 285 82 0 7 80 5 between Plymouth Street & Rt 3 N 10 10 0 25 54 54 37 10 15 25 0 66 30 6 Circle Drive, ball fields, community center 0 0 0 0 59 43 0 40 43 0 0 0 0 Used future land use to develop future trips for each zone Zone # Imported future origins and destinations into calibrated matrix Parking Turnover Special Generator Employee Housing Parking Total Trips Zone Name Code DestinOrigins Retail Non SFU MFU High Med Low SFU MFU High Med Low Retail Non Total 1 Boynton Road 1 0 15 150 0 0 0 0 150 0 0 0 0 0 18 168 2 Northwestern Lake Waukewan, pub 2 0 0 10 10 131 10 0 0 0 131 5 0 0 0 20 12 168 3 North of Boynton Road 1 0 0 10 0 0 0 0 10 0 0 0 0 0 0 10 4 Western Lake Waukewan 1 0 0 285 82 0 7 80 285 41 0 5 30 0 0 361 5 between Plymouth Street & Rt 3 N 2 54 54 37 10 15 25 0 66 30 15 13 0 43 11 73 12 274 6 Circle Drive, ball fields, community 2 59 43 0 40 43 0 0 0 0 43 0 0 0 0 0 48 193 95 96 6 217 143 99 17 115 75 20 19 377 24 232 75 33 64 205 103 113 94 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 73 1 0 0 0 1 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 1 0 72 2 0 0 0 1 1 1 0 0 0 0 0 2 0 0 1 0 0 0 1 1 1 4 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 144 4 1 1 0 0 2 2 0 1 1 0 0 8 0 0 1 1 0 2 2 3 1 132 5 1 1 0 3 0 2 0 1 1 0 0 7 0 0 1 1 0 1 2 2 1 94 6 0 1 0 2 1 0 0 1 1 0 0 5 0 0 1 0 0 1 1 2 1 43

Meredith US 3/NH 25 Improvements Transportation Planning Study Next Steps Finish Alternatives Development Screening Meredith Bay Public Meeting Next Meeting April 15 Lake Waukewan