Montana's 51% comparative fault bar (Mont. Code Ann. sec. 27-1-702), the 75 mph rural interstate speed limit (formerly no daytime speed limit), elk and deer collision frequency on Montana highways, and the three-year SOL

Montana auto accident law basics: (1) Modified comparative fault -- Mont. Code Ann. sec. 27-1-702: Montana uses the "51% bar" version of modified comparative fault -- a plaintiff who is found 51% or more at fault for an accident is completely barred from recovery. A plaintiff at 50% fault (or less) recovers proportionally reduced damages. The jury allocates fault percentages among all parties, and the court applies the reduction and bar. Montana's 51% bar contrasts with Maine's 50% bar; (2) Three-year statute of limitations -- Mont. Code Ann. sec. 27-2-204: Montana personal injury claims (including auto accident bodily injury) must be filed within three years of the date of injury. Tolling applies for minors (SOL tolled until age 18; then 3 years from age 18) and for mental incapacity; (3) Montana's former "no speed limit" and the 75 mph era: from 1974 (when the national maximum speed limit was 55 mph; Montana technically complied but imposed only a "reasonable and prudent" standard with a small fine; enforcement was essentially symbolic) until 1999 (when Montana enacted a 75 mph rural interstate speed limit after the Supreme Court struck down the "reasonable and prudent" standard as unconstitutionally vague in State v. Stanko, 1998 MT 323), Montana had effectively no daytime speed limit on rural highways. The current Montana rural interstate speed limit is 80 mph (enacted 2015; the highest in the US); (4) Wildlife-vehicle collisions in Montana: Montana's large wildlife population -- elk (approximately 150,000 elk statewide; Rocky Mountain elk herds in the Bitterroot, Swan, and Flathead valleys), white-tailed and mule deer, pronghorn (eastern Montana plains), and bears (grizzly bears in northwest Montana; Glacier Country; the greater Yellowstone ecosystem) -- creates one of the highest wildlife-vehicle collision rates in the US. Elk collisions on Montana highways (US-93; MT-200; I-90 between Missoula and Deer Lodge; the Paradise Valley US-89 corridor south of Livingston) are particularly dangerous because adult bull elk weigh 700-1,100 pounds and the center of mass is at windshield height -- similar to the moose collision risk in Maine and New Hampshire. Montana wildlife collisions are covered under comprehensive (not collision) coverage; (5) Montana mandatory minimums -- Mont. Code Ann. sec. 61-6-103: Montana requires $25,000 per person/$50,000 per accident BI and $20,000 per accident PD minimum liability coverage. Montana also requires UM coverage at the same limits unless the insured rejects UM in writing (Mont. Code Ann. sec. 33-23-201).

Glacier National Park and Going-to-the-Sun Road accidents (NPS federal jurisdiction), I-90 commercial trucking accidents between Missoula and Billings, and winter road conditions on Montana mountain passes (Marias Pass; Logan Pass; Lolo Pass)

Montana regional accident patterns: (1) Glacier National Park and Going-to-the-Sun Road: Glacier National Park (Flathead and Glacier counties; 1,013,000 acres; northwestern Montana) is one of the most visited national parks in the US (approximately 3 million visitors per year; peak season July-August). Going-to-the-Sun Road (the 50-mile transmountain road across the Continental Divide through Glacier NP; connecting West Glacier to St. Mary; elevation reaching Logan Pass at 6,646 feet) is one of the most scenic (and most accident-prone) roads in Montana. Key Going-to-the-Sun Road accident issues: (a) the road is extremely narrow (no trailers or vehicles exceeding 21 feet in length or 8 feet in width permitted above Avalanche Creek to St. Mary); (b) the road is closed to vehicle traffic from October to late June due to snow; (c) accidents on federal park land require claims under the Federal Tort Claims Act (FTCA; 28 U.S.C. sec. 1346(b)) against the National Park Service; (2) I-90 commercial trucking: Interstate 90 is the primary commercial trucking corridor across Montana -- running 552 miles from the Idaho border (east of Lookout Pass; Mineral County) to the Wyoming/Montana border (near Sheridan). I-90 through Montana passes through Missoula (Missoula County), Butte (Silver Bow County), Bozeman (Gallatin County), and Billings (Yellowstone County). Commercial trucking accidents on Montana I-90 trigger FMCSA regulations (hours of service; CDL requirements; 49 CFR Part 395 log requirements; HazMat placarding for hazardous materials transport); (3) Montana mountain pass winter conditions: Montana's mountain passes are closed or extremely hazardous during winter storms. Key Montana mountain passes: (a) Marias Pass (US-2; Glacier County/Flathead County border; elevation 5,213 feet; the lowest pass across the Continental Divide in Montana; can be snowy and icy from October through May); (b) Logan Pass (Glacier NP; the highest point on Going-to-the-Sun Road; closed to vehicles from October to late June); (c) Lolo Pass (US-12; Missoula County/Idaho border; elevation 5,233 feet; the Lewis and Clark route; subject to avalanche closures); (d) MacDonald Pass (US-12; Lewis and Clark County; west of Helena; subject to winter road closures); (4) Montana ranch roads and rural negligence: much of Montana's highway accident exposure involves two-lane state and US highways that traverse ranch and agricultural lands in eastern Montana (Yellowstone County; Custer County; Prairie County; Dawson County). Eastern Montana ranching communities (Miles City; Glendive; Sidney) have significant agricultural vehicle traffic (tractors; combines; grain trucks operating at slow speeds on US highways) that creates accident exposure; (5) Montana motorcycle accidents on US-93: US-93 (the corridor from Missoula through the Flathead Valley to the Canadian border at Roosville, Lincoln County) is a popular motorcycle touring route during the Montana summer season (June-September). Motorcycle accidents on US-93 involve: deer and elk crossings at dawn and dusk; loose gravel and sand on curves in the Salish Mountains and Clark Fork River canyon sections; and tourist traffic from the Flathead Lake resort area (Polson; Bigfork; Lakeside).

Montana's uninsured motorist coverage (Mont. Code Ann. sec. 33-23-201), stacking of UM policies, Jacobsen v. Allstate bad faith standard, and Amtrak Empire Builder train-vehicle collision claims in Glacier Country

Montana distinctive accident law issues: (1) Montana UM/UIM coverage stacking -- Mont. Code Ann. sec. 33-23-201: Montana's UM statute provides that UM/UIM coverage must be offered at the same limits as liability coverage unless the insured rejects UM coverage in writing. Montana allows stacking of UM coverage in some circumstances -- if a household has multiple vehicles insured under separate policies (or under a policy with multiple vehicles), the UM limits may be stacked (combined) under Montana law, subject to anti-stacking provisions in the specific policy language. The Montana Supreme Court has addressed UM stacking in Transamerica Ins. Co. v. Royle, 202 Mont. 173 (1983) and subsequent decisions; (2) Jacobsen v. Allstate Ins. Co., 2009 MT 248 -- bad faith: the Montana Supreme Court in Jacobsen established that insurers owe a duty of good faith to first-party claimants, and that breach of this duty is a tort separate from breach of contract. The Jacobsen bad faith standard requires showing: (a) the insurer's decision to deny or delay payment was unreasonable; and (b) the insurer knew or recklessly disregarded the fact that its conduct was unreasonable. Montana recognizes both compensatory and punitive damages in bad faith cases -- punitive damages are available under Mont. Code Ann. sec. 27-1-221 if the insurer's conduct was oppressive, fraudulent, or malicious; (3) Amtrak Empire Builder train-vehicle collisions: Amtrak's Empire Builder (the Chicago-Seattle/Portland route; running through northern Montana via Havre, Shelby, Cut Bank, and Glacier National Park on the BNSF Railway's Marias Pass line) traverses remote Montana ranch and agricultural land where at-grade railroad crossings are frequently unprotected or lightly protected. Train-vehicle collisions at Montana railroad crossings involve: federal preemption (the Federal Railroad Safety Act preempts some state tort claims related to railroad crossing warning signals and train operation); BNSF Railway's duty to maintain crossing signals and warning signs; and the at-fault driver's comparative negligence; (4) Montana no-fault and PIP: Montana is NOT a no-fault auto insurance state. Montana is a traditional tort state -- injured parties must sue the at-fault driver's liability insurance (or their own UM coverage) for compensation. Montana does not have a mandatory PIP (personal injury protection) requirement; (5) Montana accident and agriculture: eastern Montana agriculture (wheat; barley; lentils; sugar beets in the Yellowstone Valley near Billings and Sidney) generates significant farm equipment on public highways during planting and harvest seasons. Farm equipment (combines; tractors; grain wagons; swathers) operating on Montana state highways creates accident exposure for passing vehicles.

Car Accident Laws in Montana (2026)

Q: What is Montana's fault rule for car accidents?

Montana follows modified comparative negligence. You can recover only while your share of fault stays under the state bar (generally 50–51%); your award is cut by your fault percentage, and at or above the bar you recover nothing.

Focused car accidents guidance for Montana on where early mistakes cost the most, claim narrative pressure, and the early order that prevents drift.

Reviewed January 2026 2 min read Official-source grounded Ver en Espanol En Español

Key Takeaways

Montana modified comparative fault: Mont. Code Ann. sec. 27-1-702; 51% bar (plaintiff at 51%+ fault = zero recovery; at 50% or less = proportional recovery). SOL: Mont. Code Ann. sec. 27-2-204 = 3 years from date of injury; tolled for minors (until 18 + 3 years from 18) + mental incapacity. Speed limits: Montana rural interstate 80 mph (enacted 2015; highest in US; formerly 75 mph after 1999; effectively no daytime speed limit until 1999 "reasonable and prudent" standard struck down in State v. Stanko, 1998 MT 323). Mandatory minimums: Mont. Code Ann. sec. 61-6-103; $25K/person + $50K/accident BI + $20K PD. UM/UIM: Mont. Code Ann. sec. 33-23-201; must offer at same limits as liability; automatic unless written rejection; stacking allowed in some circumstances (Transamerica Ins. Co. v. Royle, 202 Mont. 173 (1983) and subsequent decisions). WILDLIFE COLLISIONS: ~150,000 MT elk + white-tailed/mule deer + pronghorn (eastern MT plains) + bears (grizzly in NW MT/Glacier Country/greater Yellowstone ecosystem); elk collisions at US-93/MT-200/I-90 Missoula-Deer Lodge/Paradise Valley US-89 particularly dangerous (adult bull elk 700-1,100 lbs; windshield-height center of mass); wildlife collisions = comprehensive coverage (not collision; no at-fault party).
Glacier National Park (Flathead/Glacier counties; 1,013,000 acres; ~3M visitors/year; peak July-August): Going-to-the-Sun Road (50-mile transmountain road; Logan Pass at 6,646 ft; October to late June snow closure; vehicles exceeding 21 ft or 8 ft width prohibited above Avalanche Creek to St. Mary; extremely narrow); NPS federal land = FTCA (28 U.S.C. sec. 1346(b)) for NPS negligence claims. I-90 commercial trucking: 552 miles Idaho border (Lookout Pass/Mineral County) to Wyoming/Montana border (near Sheridan); through Missoula + Butte (Silver Bow County) + Bozeman (Gallatin County) + Billings (Yellowstone County); FMCSA hours of service + CDL + 49 CFR Part 395 + HazMat placard requirements apply. Mountain passes: Marias Pass (US-2; 5,213 ft; October-May snow/ice; lowest Continental Divide crossing in MT) + Lolo Pass (US-12; 5,233 ft; Lewis and Clark route; avalanche closures) + MacDonald Pass (US-12; Lewis and Clark County; west Helena). US-93 motorcycle accidents: Missoula to Canadian border (Roosville/Lincoln County); elk/deer crossings at dawn/dusk; loose gravel/sand on Salish Mountains + Clark Fork River canyon curves; tourist traffic in Flathead Lake resort area (Polson/Bigfork/Lakeside).
Montana bad faith: Jacobsen v. Allstate Ins. Co., 2009 MT 248 (MT Supreme Court); duty of good faith to first-party claimants; bad faith tort = (a) denial/delay was unreasonable + (b) insurer knew/recklessly disregarded unreasonableness; compensatory + PUNITIVE damages available (Mont. Code Ann. sec. 27-1-221; required showing: oppressive + fraudulent + malicious conduct). Amtrak Empire Builder train-vehicle collisions: Chicago-Seattle/Portland route; northern MT via Havre + Shelby + Cut Bank + Glacier NP on BNSF Railway Marias Pass line; unprotected at-grade crossings in remote MT ranch/agricultural land; federal preemption (Federal Railroad Safety Act preempts some state crossing signal tort claims); BNSF duty to maintain crossing warnings + driver comparative negligence analysis. MT NOT a no-fault state: traditional tort state; no mandatory PIP; injured parties must sue at-fault driver's liability coverage or own UM coverage. Eastern MT agriculture on highways: Yellowstone County + Custer County + Prairie County + Dawson County; combines/tractors/grain wagons/swathers on state highways during planting/harvest = accident exposure for passing vehicles; Miles City/Glendive/Sidney agricultural communities.

Key Numbers — Montana All 50 states →

Filing Deadline 3 years

Fault Rule Modified Comparative

Insurance System At-Fault

Key Statute Mont. Code Ann. § 27-2-204

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Quick Answers — verified January 2026

Is Montana a no-fault state?

No — Montana is an at-fault (tort) state. There is no mandatory no-fault/PIP insurance, so an injured driver files against the at-fault driver's liability insurer (or their own uninsured/underinsured-motorist coverage). Montana decides shared blame under its comparative-fault rule.

What is the statute of limitations for a car accident in Montana?

In most Montana car-accident injury cases you generally have 3 years from the date of the crash to file a lawsuit (Mont. Code Ann. § 27-2-204). Treat this as the general deadline, not a guarantee: claims against a government agency, wrongful-death claims, property-damage-only claims, injured minors, and later-discovered injuries can follow different limits. Missing the deadline usually ends the claim, so confirm the current statute before you rely on it.

What is Montana's fault rule for car accidents?

Montana follows modified comparative negligence. You can recover only while your share of fault stays under the state bar (generally 50–51%); your award is cut by your fault percentage, and at or above the bar you recover nothing.

General legal information verified against the Montana Legislature — not legal advice. Deadlines and exceptions vary by case; confirm current law or consult a licensed Montana attorney. Montana Legislature ↗

Montana car accident law operates in a state defined by extremes: the fourth-largest US state by area (147,040 square miles) with a population of only approximately 1.1 million people, the highest posted speed limits in the contiguous United States (Montana had no daytime speed limit for many years until a 1999 law established 75 mph on rural interlane highways), and a landscape where wildlife-vehicle collisions, single-vehicle accidents on unlit rural highways, and extreme winter weather conditions on mountain passes dominate the accident pattern. Montana has the highest traffic fatality rate per vehicle mile traveled of any US state in most years -- a distinction driven not by reckless drivers but by the geometry of the state: long distances between destinations, high speeds, wildlife, and winter conditions on two-lane highways like US-2 (the "Hi-Line" across northern Montana from Havre to Whitefish), US-93 (the corridor from Missoula through the Flathead Valley), and US-191 (the east Yellowstone corridor through the Paradise Valley). Montana personal injury law: Montana uses a modified comparative fault system with a 51% bar (Mont. Code Ann. sec. 27-1-702) -- a plaintiff who is found 51% or more at fault is completely barred from recovery.

Montana's statute of limitations for personal injury claims is three years (Mont. Code Ann. sec. 27-2-204), and the mandatory liability insurance minimum is $25,000 per person/$50,000 per accident for bodily injury and $20,000 per accident for property damage (Mont. Code Ann. sec. 61-6-103). Montana has adopted the Uninsured Motorist statute (Mont. Code Ann. sec. 33-23-201) requiring UM coverage to be offered at the same limits as liability coverage unless the insured rejects UM coverage in writing. The Montana Supreme Court's decision in Jacobsen v. Allstate Ins. Co., 2009 MT 248, established the framework for bad faith insurance claims in Montana -- the Court held that insurers have a duty of good faith and fair dealing that runs to first-party claimants, and that breach of this duty supports a tort claim for extra-contractual damages.

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