Practice what signs mean and what to do when you see them, with questions based on the Colorado Driver Handbook.
On all roads, sign or no sign
The Pass 3 ft min sign is a reminder. The 3-foot rule applies on every road even without one.
Source: Colorado Driver Handbook (DR 2337), Traffic Signs, Pass 3 ft min signs, printed p. 9 (PDF p. 12)
Orange
Work zone signs are orange with black letters or symbols.
Source: Colorado Driver Handbook (DR 2337), Traffic Signs, Work zone signs, printed p. 8 (PDF p. 11)
Blue
Blue ENS signs list a phone number to report problems at the crossing.
A railroad crossing
The R X R marking and a stop line may be painted before a railroad crossing.
Source: Colorado Driver Handbook (DR 2337), Railroad Crossing, Pavement markings, printed p. 21 (PDF p. 24)
How many tracks cross there
Where there is more than one track, a sign under the crossbuck gives the number of tracks.
Source: Colorado Driver Handbook (DR 2337), Railroad Crossing, Crossbuck signs, printed p. 21 (PDF p. 24)
Bicyclists may ride in the center of the lane
Bicyclists may take the middle of the lane when hazards or poor visibility make the right side unsafe.
Yellow or fluorescent green, with black symbols
Warning signs alert you to hazards like curves, slippery roads, merging traffic or pedestrians.
Source: Colorado Driver Handbook (DR 2337), Traffic Signs, Warning signs, printed p. 8 (PDF p. 11)
Directions and mileage to places
Guide signs have a green background and give directions and distances.
Source: Colorado Driver Handbook (DR 2337), Traffic Signs, Guide signs, printed p. 8 (PDF p. 11)
Do not go past it
Do Not Enter and Wrong Way signs mean you are heading the wrong way. Do not proceed past them.
Trains will not sound horns, so rely on lights and gates
Quiet zone crossings have no train horns. The flashing lights and gates warn you of a train.
Source: Colorado Driver Handbook (DR 2337), Railroad Crossing, Quiet Zone signs, printed p. 21 (PDF p. 24)
We wrote these practice questions from the facts in the Colorado Driver Handbook (DR 2337, January 2025 (file DR_2337_Jan2025.pdf, footer DR 2337 (12/05/24), PDF created 2024-12-04, 36 pages), linked from https://dmv.colorado.gov/drivereducation. dmv.colorado.gov refuses automated requests (Cloudflare 403), so the owner supplied the file; read 2026-11-09. Citations give the printed page and the PDF page (PDF page = printed page + 3). PDF pages 23 (printed p. 20) and 33 also carry hidden, off-page text left over from an older edition (sections 13.3-13.5 and 15.5-16, e.g. school bus fines of up to $300 and six points); it is not visible on the page and no fact is taken from it. Where the handbook is silent, DMV pages (dmv.colorado.gov, read 2026-11-09 through a fetch tool), the Code of Colorado Regulations (1 CCR 204-30, Rule 8) and signed acts on leg.colorado.gov are the source. Statute checks used the 2024 compilation of C.R.S. title 42 (as republished by colorado.public.law, not an official host, so it is not cited) together with the 2024-2026 bills that changed it. edition) and from official sources on road signs. Every answer links to its source, so you can check it and read more.
DMV Decoded is an independent guide, not a government agency. This practice test is not connected to the Colorado Department of Revenue, Division of Motor Vehicles, and your actual test will have different questions. Study the handbook, and check the agency's website for current rules.