Ohio Road Signs Practice cheat sheet

Regulatory signs are white rectangles with black legends (or black rectangles with white legends, as on ONE WAY and some speed signs); they state a legal requirement that must be obeyed.

SPEED LIMIT signs show the maximum lawful speed in mph under normal conditions; a separate yellow advisory plaque shows a recommended speed for a curve or ramp, not a legal maximum.

A stop sign requires a complete stop at the stop line, crosswalk, or edge of the roadway, in that order of preference, before proceeding when safe.

A YIELD sign requires slowing and giving the right-of-way; a full stop is required only if traffic or conditions make it necessary.

Red circle with a slash over a black symbol means the action is prohibited (no left turn, no U-turn, no parking); a red slash alone on white means no parking in that zone.

Lane-use control signs: a white left-turn arrow means left turns only from that lane; a straight arrow means through only; a combined arrow permits either movement.

Text-only lane signs such as ONLY, LEFT LANE MUST TURN LEFT, or RIGHT LANE ENDS govern the lane beneath or beside them and override pavement arrows only when the arrow is a general guide.

Parking control signs specify time limits, permit-only zones, and no-stopping/no-standing distinctions; no stopping means no brief halt even for a passenger, no parking allows a temporary stop to load.

A yellow pentagon school sign and a yellow circular railroad advance sign are warning signs, not regulatory; do not confuse their shape with the octagon stop sign.

Warning signs are yellow diamonds with black legends (fluorescent yellow-green for school and pedestrian warnings); they alert drivers to conditions ahead and do not by themselves change the speed limit.

Curve warnings: a plain curve arrow means a turn ahead; an arrow with a speed plaque (e.g., 35 MPH) is an advisory speed determined for the curve under dry conditions.

Winding road (S-curve) symbol indicates two or more curves in succession; a reverse turn/reverse curve sign indicates the direction of the first curve.

Intersection warnings: a cross-road symbol means a four-way intersection ahead; a side-road symbol shows traffic entering from the direction of the small arrow.

Road narrowing: RIGHT/LEFT LANE ENDS, ROAD NARROWS, and NARROW BRIDGE signs warn of reduced width; merge or yield as indicated before the taper.

Grade signs show the percent of downgrade or upgrade (e.g., 6% GRADE) and may be paired with a truck escape ramp or use-low-gear plaque for long descents.

Surface hazards: SLIPPERY WHEN WET, loose gravel, and falling rocks signs call for reduced speed; the condition may exist only during rain, ice, or after maintenance.

Other warnings include deer crossing, pedestrian crossing, bicycle crossing, and low-clearance or overhead-clearance plaques; treat each as a cue to scan and slow.

Work zone signs are orange diamonds or orange rectangles with black legends; orange signals temporary traffic control, and the zone's posted speed applies only while workers or conditions warrant it.

A flagger (flagger ahead sign shows a worker holding a paddle) has the same authority as a stop sign; obey the paddle's STOP or SLOW direction and remain stopped until released.

Channelizing devices - cones, drums, tubular markers, and vertical panels - separate traffic from the work area; do not cross them even if the lane beyond appears open.

Barricades: a type I or II barricade with alternating orange/white stripes closes or restricts a lane; a type III barricade with large stripes and a sign closes the road entirely.

Detour signs are orange with black arrows and route markers; follow the detour marking rather than attempting to re-enter the closed route.

Temporary traffic signals and one-lane, two-way operations with a flagger or pilot car require waiting for the escort or green indication; passing within the work zone is prohibited.

When no workers are present and no devices restrict the lane, the normal speed limit resumes; posted work-zone speed limits are enforceable only when the zone is active per Ohio practice.

Merge early when a lane-closure sign or arrow board appears; an arrow board with a diagonal arrow directs traffic to merge in the direction shown.

Guide signs are green with white legends on freeways and major routes; they give destinations, distances, exits, and route directions rather than rules.

Interstate route markers are red, white, and blue shields; U.S. route markers are black-and-white shields; Ohio state route markers are a white outline shape on a black background.

Exit signs show the exit number, destination, and distance; exit numbers on interstates generally correspond to mileposts, so the exit number indicates the mile location.

Mile markers are small green signs along the shoulder giving the distance from the state line or route origin; they help locate a breakdown or crash for emergency dispatch.

Service signs (blue with white symbols) indicate gas, food, lodging, camping, and hospital availability at or near an upcoming exit.

Recreation and cultural interest signs are brown with white legends; they point to parks, historic sites, and scenic areas.

A white rectangular sign with black text may be regulatory (e.g., speed limit) while a green or blue sign is informational; color distinguishes the sign's purpose.

Interchange sequence signs list exits ahead; a yellow EXIT ONLY panel on a green sign warns that the lane will leave the route.

A railroad crossbuck is a white X-shaped sign with black letters reading RAILROAD CROSSING; it means yield to trains, and a stop is required if a train is approaching.

A yellow circular advance warning sign with an RXR symbol appears before the crossing; count the number of tracks shown on the plaque (e.g., 2 TRACKS) and expect a second train.

Flashing red lights and a lowering gate mean stop and remain stopped until the gate rises and lights stop; never drive around a gate.

A white stop line and the word STOP painted on the pavement before the tracks mark where to stop; stop far enough back that the front of the vehicle does not overhang the tracks.

School zone signs are fluorescent yellow-green pentagons for the school area and may be paired with a reduced speed limit plaque that applies during posted hours or when children are present.

A school crossing sign shows children walking; a pedestrian crossing sign shows a walking figure; both require yielding to pedestrians in the crosswalk.

Crosswalk markings and school zone flashers reinforce the sign; when the yellow flashers are active, the reduced school speed limit is in effect.

If a school bus with red lights flashing is stopped on an undivided road, traffic in both directions must stop; on a divided highway, only traffic behind the bus must stop.

Red means stop, yield, or prohibition; white means regulatory requirements; yellow means warning; orange means construction and maintenance; green means guide and destination information.

Blue indicates services and motorist information; brown indicates recreation and cultural interest; fluorescent yellow-green marks school and pedestrian warnings.

Octagon = stop; inverted triangle = yield; diamond = warning; pentagon = school zone or school crossing; circle = railroad advance warning; X-shape = railroad crossbuck.

Horizontal rectangle = regulatory or guide information; vertical rectangle = regulatory (e.g., speed limit, no parking); pennant = no-passing zone on the left.

A red circle with a diagonal slash means prohibited; a red slash without a circle means no parking; a green arrow means a permitted movement.

Symbols: a walking figure = pedestrian crossing; a bicycle = bicycle crossing; a deer = animal crossing; a train = railroad; a truck on a downgrade = steep grade.

A yellow diamond with a black arrow curving and a speed plaque combines a warning shape with an advisory speed; the shape signals warning while the plaque gives a number.

A white square sign with a black symbol and red slash is a regulatory prohibition; the same symbol in yellow is a warning that the condition exists ahead.

Yellow lines separate traffic moving in opposite directions; a solid yellow line on your side means no passing, while a broken yellow line permits passing when safe.

White lines separate traffic moving in the same direction; a solid white line marks the right edge or a lane that should not be crossed, and a broken white line divides same-direction lanes.

A double solid yellow line means no passing in either direction; a solid-plus-broken yellow line means passing is allowed only for the side with the broken line.

Crosswalk markings: parallel white bars or two transverse lines mark a crosswalk; a stop line before the crosswalk shows where to stop for a red light or stop sign.

A sign and signal together: a red light with a green arrow means proceed only in the arrow direction; a sign saying NO TURN ON RED overrides a general right-turn-on-red permission.

A flashing red signal is treated as a stop sign; a flashing yellow signal means proceed with caution; a steady yellow means the signal is about to turn red, so stop if safe.

Pavement arrows in a lane correspond to the lane-use sign overhead or beside the lane; a turn-only arrow means you must turn from that lane.

Railroad pavement markings (an X and RR) and stop lines work with crossbucks and flashing lights; stop before the markings, not on the tracks.

Bike lanes marked with a bicycle symbol and solid white line are for bicycles only; do not drive, park, or stop in them, and check for cyclists before turning across them.