The Seattle Municipal Code
City of Seattle Bike Laws
Correct as of Spring 2008. Use full text weblinks to confirm current status.
Seattle city laws which are useful for bicyclists to know
SMC 11.14.055 Bicycle is a human powered steerable device with a seat and wheels bigger than 16". full text of 11.14.055
SMC 11.14.060 Bicycle lane is a portion of road for preferential or exclusive use by bicycles. full text of 11.14.060
SMC 11.14.310 A marked bicycle crossing is a portion of road indicated for bicycle crossing. full text of 11.14.310
SMC 11.14.345 Motor-driven cycle includes every bicycle with motor attached full text of 11.14.345
SMC 11.14.530 A Roadway is a portion of a highway used for travel, not including sidewalk or shoulder full text of 11.14.530
SMC 11.14.645 Traffic includes pedestrians, bicycles, ridden or herded animals and vehicles. full text of 11.14.645
SMC 11.14.710 A bicycle is a vehicle. full text of 11.14.710
SMC 11.40.020 Pedestrians must obey traffic lights & walk signals full text of 11.40.020
SMC 11.40.040 Cars must stop for Pedestrian who steps off curb at intersection. full text of 11.40.040
SMC 11.40.060 Pedestrian can't step in front of a moving car. full text of 11.40.060
SMC 11.40.090 Can cross in middle of block if no traffic. full text of 11.40.090
SMC 11.40.100 Cannot cross in middle of block with traffic light at one or both ends. full text of 11.40.100
SMC 11.40.140 Cannot cross in middle of block on arterial. full text of 11.40.140
SMC 11.44.020 Bicycles have all the same RIGHTS and RESPONSIBILITIES as cars. full text of 11.44.020
SMC 11.44.040 1 Ride as far to the right as is safe and practical except when turning or passing. full text of 11.44.040
SMC 11.44.040 2 Bicycles are not required to use a bike lane or shoulder. full text of 11.44.040
SMC 11.44.040 6 Can legally take the lane if necessary. full text of 11.44.040
SMC 11.44.040 4 Can ride on the left (with flow) on one way streets. full text of 11.44.040
SMC 11.44.040 5 Can ride 2 abreast, not more. full text of 11.44.040
SMC 11.44.040 3 Bicycles use turn lanes full text of 11.44.040
SMC 11.44.060 Riding more than two (2) abreast prohibited. full text of 11.44.060
SMC 11.44.080 It is OK to pass cars on the right if safe & there's space for bicycle traffic  full text of 11.44.080
SMC 11.44.100 A Bicycle may use a crosswalk, as if legally a pedestrian. full text of 11.41.100
SMC 11.44.100 Bicycles must yield to pedestrians when using a crosswalk. full text of 11.44.100
SMC 11.44.100 Bicycles may not enter a crosswalk in front of a moving car. full text of 11.44.100
SMC 11.44.120 Bicycles must yield to pedestrians when using a sidewalk or path. full text of 11.44.120
SMC 11.44.140 1 Must signal turns for 100 feet with left hand. (right: up, left: out, stop: down) full text of 11.44.140
SMC 11.44.140 2 Right hand signal for right turn is an acceptable substitute. full text of 11.44.140
SMC 11.44.140 3 OK to not use signal if both hands are needed to control the bicycle before turn. full text of 11.44.140
SMC 11.44.160 At night, bikes must have white light on front, red reflector on the back. full text of 11.44.160
SMC 11.44.160 A red light on the back may be used in addition to the reflector full text of 11.44.160
SMC 11.44.200 Bikes must have brakes full text of 11.44.200
SMC 11.44.210 Must ride on the seat of the bike. full text of 11.44.210
SMC 11.44.220 One person per seat. full text of 11.44.220
SMC 11.44.240 Clinging or hitching to vehicles is illegal full text of 11.44.240
SMC 11.44.260 1 Must have at least one hand on the handlebars at all times full text of 11.44.260
SMC 11.44.260 2 Cannot ride carrying anything with both hands while riding. full text of 11.44.260
SMC 11.44.280 1 May not park obstructing pedestrian or car traffic. full text of 11.44.280
SMC 11.44.280 2 May not park obstructing a bus stop or shelter. full text of 11.44.280
SMC 11.44.320 Parents are responsible for kids obeying bike laws full text of 11.44.320
SMC 11.53.190 A car may not drive in a bike lane except to turn. full text of 11.53.190
SMC 11.53.190 Turning cars must yield to bicycles in a bike lane. full text of 11.53.190
SMC 11.46.010 Gas motorized scoters and bikes may not use sidewalks, bike lanes or paths. full text of 11.46.010
SMC 11.46.010 Electric bikes may not use bike lanes or paths. full text of 11.46.010
King County Health Code
King County helmet law
KCC 9.10.010 Must wear a bicycle helmet when riding a bicycle in King County. full text of KC Health Code Title 9
For legal opinions:
consult John Duggan 206/343-1888    johnd@warrenduggan.com
or Harvey Grad 425/204-1100    harv@lawyerseattle.com
or Joe Chalverus 206/361-4840    Lawyerjoe@comcast.net
or Bob Anderton 206/262-9290    bob@andertonlaw.com
or Bob Mionske bob@bicyclelaw.com or http://www.bicyclelaw.com/html/index.html