Regulatory signs
Regulatory signs tell you a rule you have to follow. Most are white with black, red or green, and most are vertical rectangles. The stop sign is the only red octagon and the yield sign is the only triangle pointing down. A red circle with a slash means the action inside it isn't allowed.
Stop completely, then go when it's clear
Slow down, and stop if you need to let others go
Do not enter this road from here
Wrong way: turn around safely, you're facing traffic
Top legal speed on this road
Traffic goes only the way the arrow points
No left turn here
No U-turn here
Don't pass other vehicles on this stretch
No turn of any kind while the light is red
Railroad crossbuck: treat it like a yield sign
Warning signs
Warning signs are usually yellow diamonds with black symbols or words. They don't give you a rule. They tell you what's on the road ahead so you can slow down and be ready to stop. The round yellow railroad sign and the pennant-shaped no passing sign are warnings too, just in their own shapes. Some school, school crossing and pedestrian signs are fluorescent yellow-green.
Curve ahead: slow down before you reach it
Stop sign ahead: get ready to stop
Traffic signal ahead: be ready for a red light
Traffic joins from the side: adjust speed and let it merge
Crossroad ahead: watch for cars from both sides
Divided highway ends: traffic comes toward you, keep right
Slippery when wet: slow down in rain
Deer cross here: slow down, watch the roadside
No passing zone: don't start passing past this point
Railroad crossing ahead: slow down, look and listen
RR painted on the road: the tracks are close
School and work zone signs
The pentagon shape is kept for school signs. Work zone signs are orange with black letters or symbols, usually diamonds or rectangles. They warn of construction, maintenance or emergency work, lower speeds and detours. In Kentucky, speeding fines are doubled in work zones.
School ahead: slow down and watch for children
School crossing here: be ready to stop for kids
School bus stop ahead: watch for a stopped bus
Road work ahead: slow down and stay alert
Flagger ahead: be ready to stop when told
Workers on or near the road: slow down
Road closed ahead: plan to take another way
Detour: follow the signs around the closure
Lights that come up on the test
Red: stop. Right on red after stopping unless a sign says no
Yellow: the light is about to turn red
Green: go if the way is clear
Flashing red: stop fully, then go when it's clear
Flashing yellow: slow down and watch for others
Red arrow: no turn that way until it turns green
Flashing yellow arrow: turn with caution, yield first
- Two flashing red lights at the tracks mean a train is coming. Stop and wait until they stop flashing and no train is in sight.
- A left on red is allowed only from a one-way street onto another one-way street, after a full stop.
Guide and service signs
Guide signs don't give orders. Green ones show routes, towns and distances, blue ones point you to services like gas, food and hospitals, and brown ones lead to parks and points of interest.
Interstate route marker
Milepost: tells you where you are on the highway
Rest area ahead
Hospital nearby
Gas station nearby
Trailer camping nearby
Railroad crossings
The round yellow sign with an X and RR comes first and tells you to slow down, look and listen. At the tracks, the white X-shaped crossbuck means the same as a yield sign.
If your car stalls on the tracks, the manual says to get out right away and move away from the tracks toward the direction the train is coming from, then call the number posted at the crossing or 911.
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Sources: Kentucky State Police. Checked October 2026.
Rules and fees can change, so check the official site before your test.