SN01 STANDARD NOTES CITY OF SAMMAMISH 2018 FLASHING YELLOW ARROW SIGNALS PROJECT NO. DATE BY APPR REVISION COSA0023 KING COUNTY WASHINGTON

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2 STANDARD NOTES SN01 2 OF 8

3 ROADWAY PLAN PL01 3 OF 8

4 ROADWAY PLAN PL02 4 OF 8

5 LANE SHOULDER MINIMUM LANE CLOSURE TAPER LENGTH = L MINIMUM SHOULDER TAPER LENGTH = L/ FREEWAYS & EXPRESSWAYS RURAL HIGHWAYS RURAL ROADS 45 / 55 MPH 500' ± RURAL ROADS & URBAN ARTERIALS 35 / MPH 350' ± RURAL ROADS & URBAN ARTERIALS RESIDENTIAL & BUSINESS DISTRICTS SIGN SPACING = X (1) 55 / 70 MPH / 65 MPH 1500' ± 800' ± 25 / 30 MPH 200' ± (2) URBAN STREETS 25 MPH OR LESS ± (2) (1) ALL SPACING MAY BE ADJUSTED TO ACCOMMODATE INTERCHANGE RAMPS, ATGRADE INTERSECTIONS AND DRIVEWAYS. (2) THIS SPACING MAY BE REDUCED IN URBAN AREAS TO FIT ROADWAY CONDITIONS. CHANNELIZATION DEVICE SPACING MPH 50/70 35/45 25/30 TAPER TANGENT 80 BUFFER DATA LONGITUDINAL BUFFER SPACE = B SPEED (MPH) LENGTH TRANSPORTABLE ATTENUATOR ROLL DISTANCE = R 9,0 TO 22,000 lbs. 123' 172' > 22,000 lbs. < 45 MPH 4555 MPH > 55 MPH < 45 MPH 4555 MPH > 55 MPH 74' 150' 8' ' USE A MINIMUM 3 DEVICES TAPER FOR SHOULDER LESS THEN 8'. 2' MIN. PCMS 1 2 AREA RIGHT LANE CLOSURE 1 MILE L/3 SEE NOTE 4 X X X L B R 2.0 SEC 2.0 SEC FIELD LOCATE 1 MILE ± IN ADVANCE OF LANE CLOSURE SIGNING. ROAD LEGEND TEMPORARY SIGN LOCATION TRAFFIC SAFETY DRUM W201 RIGHT LANE CLOSED W205R W42(L) NOTES: SEE SPECIAL PROVISIONS FOR HOUR RESTRICTIONS. EXTEND DEVICE TAPER AT L/3 ACROSS SHOULDER. DEVICES SHALL NOT ENCROACH INTO THE ADJACENT LANE. USE TRANSVERSE DEVICES IN CLOSED LANE EVERY 1000' (FT) (RECOMMENDED). SEQUENTIAL ARROW SIGN TRANSPORTABLE ATTENUATOR SINGLELANE CLOSURE FOR MULTILANE ROADWAYS 5. DEVICE SPACING FOR THE DOWNSTREAM TAPER SHALL BE 20' (FT). PCMS PORTABLE CHANGEABLE MESSAGE SIGN NOT TO SCALE 6. ALL SIGNS ARE BLACK ON ORANGE. TRAFFIC CONTROL PLAN TC01 5 OF 8

6 SIGN SPACING = X (1) RURAL ROADS & URBAN ARTERIALS RURAL ROADS, URBAN ARTERIALS, RESIDENTIAL & BUSINESS DISTRICTS 35 / MPH 25 / 30 MPH 350' ± 200' ± (2) URBAN STREETS 25 MPH OR LESS ± (2) (1) ALL SPACING MAY BE ADJUSTED TO ACCOMMODATE INTERSECTIONS AND DRIVEWAYS. (2) THIS SPACING MAY BE REDUCED IN URBAN AREAS TO FIT ROADWAY CONDITIONS. SHOULDER MINIMUM SHOULDER TAPER LENGTH = L/ ' 10' USE A 3 DEVICES TAPER FOR SHOULDERS LESS THEN 8' CHANNELIZATION DEVICE SPACING MPH 35/ 25/30 TAPER TANGENT BUFFER DATA LONGITUDINAL BUFFER SPACE = B SPEED (MPH) LENGTH TRANSPORTABLE ATTENUATOR ROLL DISTANCE = R 9,0 TO 22,000 lbs. > 22,000 lbs. < 45 MPH 4555 MPH > 55 MPH < 45 MPH 4555 MPH > 55 MPH 123' 172' 74' 150' PROTECTIVE VEHICLE ( VEHICLE) = R NO SPECIFIED DISTANCE REQUIRED 10' MIN. 2' MIN. AREA X X L/3 B R 50' ROAD W201 W215 SHOULDER LEGEND TEMPORARY SIGN LOCATION CHANNELIZING DEVICES PROTECTIVE VEHICLE SHOULDER CLOSURE LOW SPEED ( MPH OR LESS) NOT TO SCALE NOTES: 1. DEVICE SPACING FOR THE DOWNSTREAM TAPER SHALL BE 20' (FT). 2. ALL SIGNS ARE BLACK ON ORANGE. TRAFFIC CONTROL PLAN TC02 6 OF 8

7 FREEWAYS & EXPRESSWAYS RURAL HIGHWAYS RURAL ROADS 45 / 55 MPH 500' ± RURAL ROADS & URBAN ARTERIALS 35 / MPH 350' ± RURAL ROADS & URBAN ARTERIALS RESIDENTAL & BUSINESS DISTRICTS SIGN SPACING = X (1) 55 / 70 MPH 1500' ± / 65 MPH 800' ± 25 / 30 MPH 200' ± (2) URBAN STREETS 25 MPH OR LESS ± (2) (1) ALL SPACING MAY BE ADJUSTED TO ACCOMMODATE INTERCHANGE RAMPS, ATGRADE INTERSECTIONS AND DRIVEWAYS. (2) THIS SPACING MAY BE REDUCED IN URBAN AREAS TO FIT ROADWAY CONDITIONS. 30" R32 R/B/W 30" MINIMUM SHOULDER TAPER LENGTH = L/3 SHOULDER AREA 8' ' USE A MINIMUM 3 DEVICES TAPER FOR SHOULDER LESS THEN 8'. CHANNELIZATION DEVICE SPACING MPH 50/70 35/45 25/30 TAPER TANGENT 80 X ROAD X X L R W201 W42R W205L LEFT LANE CLOSED 1 LEFT LANE CLOSURE PCMS 2 1 MILE 2.0 SEC 2.0 SEC FIELD LOCATE 1 MILE ± IN ADVANCE OF LANE CLOSURE SIGNING. LEGEND TEMPORARY SIGN LOCATION CHANNELIZING DEVICES PCMS PORTABLE CHANGEABLE MESSAGE SIGN TEMPORARY SIGN LOCATION (5' MOUNTING HEIGHT) OFFICER CONTROLLED LEFT TURN POCKET CLOSURE NOT TO SCALE SEE SPECIAL PROVISIONS FOR CLOSURE HOUR RESTRICTIONS. TYPICAL APPLICATION SHOWN. ADJUST FOR SITE CONDITIONS. ALL SIGNS ARE BLACK ON ORANGE UNLESS OTHERWISE DESIGNATED. TRAFFIC CONTROL PLAN TC03 7 OF 8

8 CHANNELIZATION DEVICE SPACING MPH 50/70 35/45 25/30 TAPER TANGENT LANE MINIMUM TAPER LENGTH = L AREA W42(L) RIGHT LANE CLOSED W205R R B L X X X ROAD W201 RURAL HIGHWAYS BUFFER DATA LONGITUDINAL BUFFER SPACE = B SPEED (MPH) LENGTH TRANSPORTABLE ATTENUATOR ROLL DISTANCE = R 9,0 TO 22,000 lbs. 123' 172' SIGN SPACING = X (1) / 65 MPH 800' ± RURAL ROADS 45 / 55 MPH 500' ± RURAL ROADS & URBAN ARTERIALS 35 / MPH 350' ± RURAL ROADS & URBAN ARTERIALS RESIDENTAL & BUSINESS DISTRICTS > 22,000 lbs. < 45 MPH 4555 MPH > 55 MPH < 45 MPH 4555 MPH > 55 MPH 74' PROTECTIVE VEHICLE ( VEHICLE) = R NO SPECIFIED DISTANCE REQUIRED 150' 25 / 30 MPH 200' ± (2) URBAN STREETS 25 MPH OR LESS ± (2) (1) ALL SPACING MAY BE ADJUSTED TO ACCOMMODATE INTERCHANGE RAMPS, ATGRADE INTERSECTIONS AND DRIVEWAYS. (2) THIS SPACING MAY BE REDUCED IN URBAN AREAS TO FIT ROADWAY CONDITIONS. LEGEND TEMPORARY SIGN LOCATION CHANNELIZING DEVICES SEQUENTIAL ARROW SIGN PROTECTIVE VEHICLE RECOMMENDED INTERSECTION LANE CLOSURE ~ FIVE LANE ROADWAY NOT TO SCALE NOTES RECOMMEND EXTENDING DEVICE TAPER (L/3) ACROSS SHOULDER. IF A SIGNAL IS PRESENT, IT SHALL BE SET TO "RED FLASH MODE" OR TURNED OFF DURING FLAGGING OPERATIONS. MAINTAIN A MINIMUM OF ONE ACCESS POINT FOR EACH BUSINESS WITHIN AREA LIMITS. ALL SIGNS ARE BLACK ON ORANGE. TRAFFIC CONTROL PLAN TC04 8 OF 8