Sources and image credits
Every fact on Drivoku US comes from a public source that we link on the page. This page lists the sources and credits the pictures.
The national sign manual
Sign and marking facts come from the Manual on Uniform Traffic Control Devices, 11th Edition (MUTCD), published by the Federal Highway Administration (FHWA). Each sign page names the MUTCD sections it uses and links to the chapter.
Drivoku is not connected to FHWA, to any state driver licensing agency or to any government body.
Our drawings
The sign pictures and marking diagrams are our own simplified drawings, © Fri Vei AS. They are based on the MUTCD designs, which the MUTCD says are in the public domain (Section 1D.06). Real signs follow FHWA’s detailed Standard Highway Signs specifications, so our drawings are not exact copies. The MUTCD lists a few designs that are not in the public domain, including the Interstate shield, so we do not draw it. To ask about using our drawings, email support@drivoku.com.
Every sign and marking page uses one of these drawings. The MUTCD number is the design each drawing is based on.
| Page | Based on | Our file |
|---|---|---|
| Advisory speed plaque | W13-1P | advisory-speed-w13-1p.svg |
| All-way stop sign | R1-3P | all-way-stop-r1-3p.svg |
| Bicycle crossing sign | W11-1 | bicycle-crossing-w11-1.svg |
| Bump sign | W8-1 | bump-w8-1.svg |
| Cardinal direction plaque | M3-1 | cardinal-direction-m3-1.svg |
| Chevron alignment sign | W1-8 | chevron-alignment-w1-8.svg |
| Curve ahead sign | W1-2 | curve-ahead-w1-2.svg |
| Dead end sign | W14-1 | dead-end-w14-1.svg |
| Deer crossing sign | W11-3 | deer-crossing-w11-3.svg |
| Destination sign | D1-1 | destination-sign-d1-1.svg |
| Detour sign | W20-2 | detour-w20-2.svg |
| Dip sign | W8-2 | dip-w8-2.svg |
| Divided highway ends sign | W6-2 | divided-highway-ends-w6-2.svg |
| Divided highway sign | W6-1 | divided-highway-w6-1.svg |
| Do not enter sign | R5-1 | do-not-enter-r5-1.svg |
| Do not pass sign | R4-1 | do-not-pass-r4-1.svg |
| Do not stop on tracks sign | R8-8 | do-not-stop-on-tracks-r8-8.svg |
| End road work sign | G20-2 | end-road-work-g20-2.svg |
| End school zone sign | S5-2 | end-school-zone-s5-2.svg |
| Exempt railroad crossing plaque | R15-3P | exempt-crossing-r15-3p.svg |
| Flagger ahead sign | W20-7 | flagger-ahead-w20-7.svg |
| Gas services sign | D9-7 | gas-services-d9-7.svg |
| Hospital sign | D9-2 | hospital-d9-2.svg |
| Cross road sign | W2-1 | intersection-ahead-w2-1.svg |
| Keep left sign | R4-8 | keep-left-r4-8.svg |
| Keep right except to pass sign | R4-16 | keep-right-except-to-pass-r4-16.svg |
| Keep right sign | R4-7 | keep-right-r4-7.svg |
| Lane closed ahead sign | W20-5 | lane-closed-ahead-w20-5.svg |
| Lane ends sign | W4-2 | lane-ends-w4-2.svg |
| Left turn only sign | R3-5 | left-turn-only-r3-5.svg |
| Left turn yield on green sign | R10-12 | left-turn-yield-on-green-r10-12.svg |
| Merge sign | W4-1 | merge-w4-1.svg |
| Mile marker sign | D10-2 | mile-marker-d10-2.svg |
| Move over or reduce speed sign | R16-3 | move-over-r16-3.svg |
| No bicycles sign | R5-6 | no-bicycles-r5-6.svg |
| No left turn sign | R3-2 | no-left-turn-r3-2.svg |
| No parking sign | R8-3 | no-parking-r8-3.svg |
| No passing zone sign | W14-3 | no-passing-zone-w14-3.svg |
| No right turn sign | R3-1 | no-right-turn-r3-1.svg |
| No turn on red sign | R10-11 | no-turn-on-red-r10-11.svg |
| No U-turn sign | R3-4 | no-u-turn-r3-4.svg |
| Number of tracks plaque | R15-2P | number-of-tracks-r15-2p.svg |
| One lane road ahead sign | W20-4 | one-lane-road-ahead-w20-4.svg |
| One way sign | R6-1 | one-way-r6-1.svg |
| Pedestrian crossing sign | W11-2 | pedestrian-crossing-w11-2.svg |
| Push button for walk signal sign | R10-3 | pedestrian-push-button-r10-3.svg |
| Playground sign | W15-1 | playground-w15-1.svg |
| Railroad crossbuck sign | R15-1 | railroad-crossbuck-r15-1.svg |
| Railroad crossing ahead sign | W10-1 | railroad-crossing-ahead-w10-1.svg |
| Recreation and cultural interest sign | Section 2M.09 | recreation-sign.svg |
| Right lane ends sign | W9-1 | right-lane-ends-w9-1.svg |
| Road narrows sign | W5-1 | road-narrows-w5-1.svg |
| Road work ahead sign | W20-1 | road-work-ahead-w20-1.svg |
| School bus stop ahead sign | S3-1 | school-bus-stop-ahead-s3-1.svg |
| School sign | S1-1 | school-s1-1.svg |
| School speed limit sign | S5-1 | school-speed-limit-s5-1.svg |
| Sharp turn sign | W1-1 | sharp-turn-w1-1.svg |
| Side road sign | W2-2 | side-road-w2-2.svg |
| Signal ahead sign | W3-3 | signal-ahead-w3-3.svg |
| Slippery when wet sign | W8-5 | slippery-when-wet-w8-5.svg |
| Slower traffic keep right sign | R4-3 | slower-traffic-keep-right-r4-3.svg |
| Speed limit sign | R2-1 | speed-limit-r2-1.svg |
| Stop ahead sign | W3-1 | stop-ahead-w3-1.svg |
| Stop here on red sign | R10-6 | stop-here-on-red-r10-6.svg |
| Stop here when flashing sign | R8-10 | stop-here-when-flashing-r8-10.svg |
| Stop lines and crosswalks | Part 3 (markings) | stop-line-and-crosswalk.svg |
| Stop sign | R1-1 | stop-r1-1.svg |
| Two-way left-turn lane | Part 3 (markings) | two-way-left-turn-lane.svg |
| US route sign | M1-4 | us-route-sign-m1-4.svg |
| White lane lines | Part 3 (markings) | white-lane-lines.svg |
| Wrong way sign | R5-1 | wrong-way-r5-1a.svg |
| Yellow center lines | Part 3 (markings) | yellow-center-lines.svg |
| Yield ahead sign | W3-2 | yield-ahead-w3-2.svg |
| Yield here to pedestrians sign | R1-5 | yield-here-to-pedestrians-r1-5.svg |
| Yield sign | R1-2 | yield-r1-2.svg |
| No turns sign | R3-3 | no-turns-r3-3.svg |
| Left lane must turn left sign | R3-7 | left-lane-must-turn-left-r3-7.svg |
| Pass with care sign | R4-2 | pass-with-care-r4-2.svg |
| Trucks use right lane sign | R4-5 | trucks-use-right-lane-r4-5.svg |
| Stay in lane sign | R4-9 | stay-in-lane-r4-9.svg |
| Do not drive on shoulder sign | R4-17 | do-not-drive-on-shoulder-r4-17.svg |
| Emergency stopping only sign | R8-7 | emergency-stopping-only-r8-7.svg |
| Do not block intersection sign | R10-7 | do-not-block-intersection-r10-7.svg |
| Road closed sign | R11-2 | road-closed-r11-2.svg |
| Road closed to thru traffic sign | R11-4 | road-closed-to-thru-traffic-r11-4.svg |
| Weight limit sign | R12-1 | weight-limit-r12-1.svg |
| Reverse turn sign | W1-3 | reverse-turn-w1-3.svg |
| Reverse curve sign | W1-4 | reverse-curve-w1-4.svg |
| Winding road sign | W1-5 | winding-road-w1-5.svg |
| Large arrow sign | W1-6 | large-arrow-w1-6.svg |
| Two-direction large arrow sign | W1-7 | two-direction-large-arrow-w1-7.svg |
| T intersection sign | W2-4 | t-intersection-w2-4.svg |
| Y intersection sign | W2-5 | y-intersection-w2-5.svg |
| Be prepared to stop sign | W3-4 | be-prepared-to-stop-w3-4.svg |
| Reduced speed limit ahead sign | W3-5 | reduced-speed-limit-ahead-w3-5.svg |
| Two-way traffic sign | W6-3 | two-way-traffic-w6-3.svg |
| Narrow bridge sign | W5-2 | narrow-bridge-w5-2.svg |
| One lane bridge sign | W5-3 | one-lane-bridge-w5-3.svg |
| No outlet sign | W14-2 | no-outlet-w14-2.svg |
| Pavement ends sign | W8-3 | pavement-ends-w8-3.svg |
| Soft shoulder sign | W8-4 | soft-shoulder-w8-4.svg |
| Low shoulder sign | W8-9 | low-shoulder-w8-9.svg |
| Bridge ices before road sign | W8-13 | bridge-ices-before-road-w8-13.svg |
| Loose gravel sign | W8-7 | loose-gravel-w8-7.svg |
| Fallen rocks sign | W8-14 | fallen-rocks-w8-14.svg |
| Low clearance sign | W12-2 | low-clearance-w12-2.svg |
| Road closed ahead sign | W20-3 | road-closed-ahead-w20-3.svg |
| Workers sign | W21-1a | workers-w21-1a.svg |
| Shoulder work sign | W21-5 | shoulder-work-w21-5.svg |
| Utility work ahead sign | W21-7 | utility-work-ahead-w21-7.svg |
| Road work next miles sign | G20-1 | road-work-next-miles-g20-1.svg |
| Tracks out of service sign | R8-9 | tracks-out-of-service-r8-9.svg |
| Do not drive on tracks sign | R15-6a | do-not-drive-on-tracks-r15-6a.svg |
| Look sign at a rail crossing | R15-8 | look-r15-8.svg |
| Distance sign | D2-1 | distance-sign-d2-1.svg |
| Street name sign | D3-1 | street-name-sign-d3-1.svg |
| No parking any time sign | R7-1 | no-parking-any-time-r7-1.svg |
| Double arrow sign | W12-1 | double-arrow-w12-1.svg |
| Hill blocks view sign | W7-6 | hill-blocks-view-w7-6.svg |
| Freeway ends sign | W19-3 | freeway-ends-w19-3.svg |
| Truck escape ramp sign | W7-4c | truck-escape-ramp-w7-4c.svg |
Other sources
(3)
- Teenagers, IIHS: graduated driver licensing
- Reducing risk for teen drivers, CDC: teen driver safety and the parent-teen driving agreement
- State MUTCD information, FHWA: how states adopt the MUTCD
Texas sources
Our Texas pages and the Texas practice test use the Texas Transportation Code and other Texas statutes (Texas Constitution and Statutes), the Texas Driver Handbook from the Texas Department of Public Safety, and the parent-taught driver education pages of the Texas Department of Licensing and Regulation. Drivoku is not connected to either agency.
Our questions
Every quiz question on this site is written by us from these sources, with AI help, and checked against them. They are not questions from any state’s permit test. How we make our questions explains the process and what has not been done, such as a review by a driving instructor.
Each guide and sign page lists the exact sources it uses and the date we last checked them.