On a two-lane state highway you cannot change lanes as you pass a stopped police car with its lights on. No temporary limit is posted. How fast may you go?
One-half the posted speed limit
The posted speed limit
20 mph below the posted limit
10 mph below the posted limit
Show the answer
One-half the posted speed limit
The reduction is larger when you cannot give the vehicle a lane of space.
On a state highway you approach a stationary highway worker vehicle using its emergency lights, and you can change lanes. No temporary limit is posted. What speed is required?
10 mph below the posted limit
40 mph below the posted limit
20 mph below the posted limit
30 mph below the posted limit
Show the answer
30 mph below the posted limit
The reduction on interstates is smaller, at 20 mph below.
We wrote these practice questions from the facts in the Montana Driver Manual (Montana Driver Manual, Form 25-0100 (Montana Department of Justice, Motor Vehicle Division, Driver Services Bureau). The cover says 'Revised April 2024' and the last page says 'Revised November 2023'; the file is hosted at mvdmt.gov under /uploads/2026/05/ with the name '25-0100M-Montana-Driver-Manual-English-05.26.pdf', linked from the Motor Vehicle Division's driver pages, read 2026-11-10. 99 PDF pages; page numbers cited are PDF pages, which equal the printed page number plus 10 (printed page 1 is PDF p. 11). PDF p. 10 is blank. Because the manual predates several law changes, every legal rule used in questions was checked against the Montana Code Annotated 2025 on mca.legmt.gov (read 2026-11-10); questions follow the statute and the MVD's own Drivers Under 18 and New Drivers 18+ pages (mvdmt.gov, read 2026-11-10 in the browser pane because curl gets a Cloudflare 403). Out-of-date or inconsistent manual statements and how they were handled: (1) speed limits (PDF p. 48 table: interstate 75/80, urban highways 65, two-lane 70/65, separate heavy-truck columns) differ from § 61-8-303, MCA: 80 mph on interstates outside an urbanized area of 50,000 or more at all times, 65 mph inside one, 70 day/65 night on other public highways, 25 mph in an urban district; questions use the statute and ask nothing about trucks; (2) the slow-down rule near stopped emergency vehicles (PDF p. 90: 20 mph below the limit on roads posted 50 mph or more, citing § 61-8-346) is out of date: § 61-8-346 was repealed in 2023 (Ch. 567, L. 2023) and § 61-8-388, MCA now sets the reduction (20 mph below on an interstate and 30 mph below on a state highway or county road if the driver can change lanes, one-half the limit if not, and also covers highway worker vehicles); questions use the statute; (3) DUI penalties (PDF p. 82: first conviction fine $300-$1,000, 1-60 days in jail, six-month suspension) differ from § 61-8-1007, MCA (first offense: at least 24 consecutive hours and up to six months in jail, fine $600-$1,000, higher if a passenger under 16 was aboard); test refusal is a six-month suspension for a first refusal and one year for a second within five years (§ 61-8-1032); questions use the statute; (4) minimum insurance (PDF p. 57: $10,000 property damage) differs from § 61-6-103, MCA ($25,000/$50,000/$20,000); the manual's penalty text (fine, 10 days in jail, 5 points) also differs from § 61-6-304 (first conviction fine $250-$500, no jail); questions use the statute; (5) crash reporting (PDF p. 90: report to law enforcement at $500 or more of damage and to the Highway Patrol at $1,000) differs from §§ 61-7-108 and 61-7-109, MCA ($1,000 or more for immediate notice, written report to the department within 10 days unless police reported); questions use the statute; (6) child restraints (PDF pp. 29-30: children up to age 6 and 60 pounds) differ from § 61-9-420, MCA, which sets rear-facing under 2, harness seat or booster from 4 up to 8, and an adult belt from age 9 or when the booster is outgrown; questions use the statute; (7) work zone fines (PDF pp. 37-38: 'fines double') are doubled only when a highway worker is present within 1,000 feet of the violation (§ 61-8-314(5), MCA); questions use the statute; (8) learner permit age (PDF pp. 12 and 18: 16, or 15 with a traffic education course) differs from the MVD Drivers Under 18 page and §§ 61-5-105 and 61-5-106, MCA (15 without a course, 14 1/2 in an approved course); questions use the statute and the MVD page; (9) the right-lane rule (PDF p. 37: stay in the right lane except to pass on roads with three or more lanes) differs from § 61-8-321(3), MCA (applies on roads with two or more lanes in one direction); questions use the statute; (10) the manual's 'fines are doubled in all school zones' (PDF p. 39) is narrower in § 61-8-726, MCA: the doubling applies to violations of a special school zone limit set by a local authority; questions use the statute; (11) the manual says drivers must always have a valid license in their possession (PDF p. 11) but is silent on digital licenses; since September 1, 2025 § 61-5-116 lets a digital or hard copy authorized by the department meet the carry requirement; (12) the 50 hours (10 at night) of supervised driving appear on the MVD page and match § 61-5-132(1)(c)(i), but the statute sets 75 hours (15 at night) after an alternative traffic education course; questions state the MVD figure and ask only about the standard 50/10 route; (13) PDF p. 11 says a Class D license is valid 'four to eight years', PDF pp. 8 and 13 say 12 years (8 with REAL ID) and PDF p. 18 says eight years or less (four after age 75); no question asks the license term; (14) phones: PDF p. 59 only says that most Montana cities have passed texting and talking laws; no statewide hand-held ban was found in the Montana Code Annotated or the 2025 session law index, so phone_distraction questions teach the manual's safety advice and no common phone-law question is sourced; (15) the manual says appointments are required at all stations (PDF p. 20) but also that some stations require them (PDF p. 11); no question asks 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 Montana Department of Justice, Motor Vehicle Division, and your actual test will have different questions. Study the handbook, and check the agency's website for current rules.