Road signs in the United States

All 629 road signs used in the United States, grouped by type, with what each one means.

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Last updated: May 27, 2026

Every sign in the United States

These are the signs as they appear in the United States, which uses its own sign system.

Warning signs

267 signs
  • Added lane from leftCode W4-3LAn additional travel lane is added from the left side ahead; traffic from the left does not need to merge immediately.
  • Added lane from rightCode W4-3RAn additional travel lane is added from the right side ahead; traffic from the right does not need to merge immediately.
  • Advisory speed 35mph plaqueCode W13-1aPAdvisory speed of 35 mph for the condition or feature described by the sign above.
  • Be prepared to stopCode W3-4Drivers should be prepared to stop due to a signal or other control ahead.
  • Bear crossingCode W11-16Bears may be crossing or on the roadway ahead.
  • Bicycle crossingCode W11-1Warning of a bicycle crossing or shared bicycle path crossing the road ahead.
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Priority signs

3 signs
  • Railroad crossbuckCode R15-1Railroad crossing ahead — drivers must yield to trains.
  • StopCode R1-1Drivers must come to a complete stop before proceeding.
  • YieldCode R1-2Drivers must yield the right-of-way to traffic on the intersecting road.

Prohibition signs

80 signs
  • Axle weight limit 5 tonsCode R12-2Vehicles with an axle weight exceeding 5 tons are prohibited from using this road.
  • Bridge outCode R11-2bThe bridge ahead is out and the road is impassable.
  • Bridge out ahead local traffic onlyCode R11-3bThe bridge is out a specified number of miles ahead; only local traffic is permitted beyond this point.
  • Do not block intersectionCode R10-7Drivers must not enter or stop in the intersection if they cannot clear it before the signal changes.
  • Do not drive on shoulderCode R4-17Driving on the road shoulder is prohibited at this location.
  • Do not drive on tracks textCode R15-6aInstructs drivers not to drive on the railroad or light rail tracks.
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Mandatory signs

164 signs
  • 3ft clearance to pass bicycleCode R4-19Drivers must maintain a minimum 3-foot clearance when passing a bicyclist.
  • All traffic leftCode R4-20LAll traffic must bear left at this point.
  • All traffic rightCode R4-20RAll traffic must bear right at this point.
  • Back in parking onlyCode R7-10Vehicles must back into parking spaces; forward-in parking is not permitted.
  • Begin daytime headlight sectionCode R16-10Marks the beginning of a section where headlights must be used during daytime hours.
  • Begin right turn lane yield to bikesCode R4-4Drivers entering the right-turn lane must yield to bicyclists in the adjacent bike lane.
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Special regulation signs

10 signs
  • Ev charging only 2hrCode R7-114This space is reserved for electric vehicle charging only with a 2-hour time limit.
  • Ev charging only 45min timedCode R7-114aThis space is reserved for electric vehicle charging only for a maximum of 45 minutes between 7AM and 10PM.
  • Ev charging only 45min timed daysCode R7-114bThis space is reserved for electric vehicle charging only for 45 minutes between 7AM and 10PM Monday through Friday.
  • Ev parking 2hrCode R7-112Parking is limited to 2 hours and reserved for electric vehicles only.
  • Ev parking 2hr timedCode R7-112aParking limited to 2 hours for electric vehicles only between 7AM and 8:30PM.
  • Ev parking 2hr timed daysCode R7-112bParking limited to 2 hours for electric vehicles only between 7AM and 8:30PM Monday through Saturday.
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Information signs

37 signs
  • Begin exit laneCode R3-57PThe exit lane begins here; drivers must move to the right to take the exit.
  • Begin higher fines zoneCode R2-10Marks the beginning of a zone where traffic fines are increased.
  • Bicycle allowed full laneCode R9-20Bicycles are permitted to use the full travel lane.
  • Bike lane closedCode R9-12The bike lane is closed to bicycle traffic.
  • Bus lane panelCode R3-6aSupplemental panel indicating the lane is designated for buses only.
  • Center lane panelCode R3-5fPSupplemental panel identifying the center lane designation for an adjacent regulatory sign.
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Additional panels

68 signs
  • All wayCode R1-3PSupplemental panel indicating that the stop or yield requirement applies to all approaches at the intersection.
  • At signal plaqueCode R10-31PSupplemental plaque reading AT SIGNAL used beneath other pedestrian crossing signs.
  • Citywide panelCode R2-5aPSupplemental panel indicating the speed regulation applies citywide.
  • Emergency vehicles weight limit plaqueCode R12-7aPSupplemental plaque indicating that the posted weight limits apply to emergency vehicles, with single axle 12T, tandem 26T, gross 43T.
  • Except local delivery panelCode R5-2aPSupplemental panel indicating that local delivery vehicles are exempt from the restriction above.
  • Except on shoulderCode R9-19PA supplemental panel indicating that the restriction above does not apply on the shoulder.
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