Motorcycle helmet and lane-splitting laws in Indiana

If a crash left you injured on an Indiana road, the way you were riding can change what happens with your claim. Indiana treats motorcycles differently from passenger cars in a handful of specific ways, and the two questions riders ask most after a wreck are whether a helmet was required and whether it was legal to slip between lanes of slow traffic. Here is what the statutes actually say, with the section numbers so you can check them yourself.

Who has to wear a helmet in Indiana

Indiana has what safety agencies call a partial helmet law. Under Indiana Code 9-19-7-1, a helmet is mandatory only for operators and passengers younger than 18. Every rider in that age group has to wear headgear that meets the U.S. Department of Transportation standard set in 49 CFR 571.218 (the "DOT" sticker on the back of a compliant helmet), and also has to wear protective glasses, goggles, or a transparent face shield.¹ The section carves out one exception: it does not apply to someone operating or riding in an autocycle.¹

Once you turn 18, Indiana lets you ride with your head uncovered, and no eye-protection mandate applies to adults either. The Insurance Institute for Highway Safety, which tracks these laws, lists Indiana's rule as covering riders 17 and younger and groups it with the states that have no all-rider requirement.² So an adult on an Indiana road is legally free to choose.

That freedom does not make the choice consequence-free in a claim. Indiana follows modified comparative fault (more on that below), and a defense insurer may argue that riding bareheaded made a head injury worse than it had to be. No Indiana statute automatically cuts an adult rider's recovery for skipping a helmet the law never required, but the argument still gets raised, so your medical records and the crash facts matter.

Is lane splitting legal in Indiana

No. Indiana Code 9-21-10-6 says a motorcycle is entitled to the full use of a traffic lane, and that no vehicle may be driven in a way that deprives a motorcycle of that full lane.³ Riding the white line between two lanes of cars, whether they are moving or stopped in traffic, is not permitted. The same goes for lane filtering, the slower-speed version some states have legalized. Indiana has not.

The statute does allow one thing people sometimes confuse with lane splitting. Two motorcycles (autocycles excluded) may ride two abreast, side by side, in a single lane, but only when both operators agree to it.³ That is a courtesy between two riders sharing one lane, not permission to pass cars by squeezing between them.

If you were splitting or filtering when the crash happened, expect that to become part of the fault analysis. It does not automatically end your claim, but it hands the other driver's insurer a comparative-fault argument.

You need an endorsement to ride

Operating a motorcycle in Indiana requires either a motorcycle endorsement on your license or a motorcycle learner's permit. To earn the endorsement through the Bureau of Motor Vehicles you pass a knowledge exam and an on-cycle skills test (or complete an approved Ride Safe Indiana course), pass a vision screening, and, if you are under 18, get a parent's signature.⁴ A learner's permit comes with real limits: a DOT helmet is required regardless of age, riding is allowed only in daylight, and you cannot carry passengers.⁵ Riding without the proper credential is its own violation, and like the items above it can feed a comparative-fault argument after a crash.

What the safety numbers say

Helmets are the biggest survivable-crash factor for a rider. NHTSA estimates that helmets are about 37 percent effective at preventing rider deaths, and a federal Crash Outcome Data Evaluation System study found them roughly 67 percent effective at preventing brain injuries.⁶ Nationally, 6,228 motorcyclists were killed in 2024, about 16 percent of all traffic deaths that year.⁷ Indiana's own crash reporting, published each year as Indiana Crash Facts by the Criminal Justice Institute, shows motorcyclists making up a small share of registered vehicles but a far larger share of the people killed on state roads.⁸ In a state where most adult riders go without a helmet, those numbers carry weight.

After a motorcycle crash in Indiana

Whether or not you wore a helmet, Indiana's crash rules still run the claim. A few that matter most:

Deadline. You generally have two years from the crash date to file a personal injury lawsuit under Indiana Code 34-11-2-4, and the same two-year window applies to a claim for damage to the bike itself.⁹ Claims against a government entity (a city bus, a pothole, a police vehicle) follow a much shorter notice deadline and a stricter fault rule, so those need prompt attention.

Fault. Indiana uses modified comparative fault with a 51 percent bar under Indiana Code 34-51-2-6. If you are found 51 percent or more at fault you recover nothing; below that, your award drops by your share of the blame.¹⁰ This is exactly where a helmet, lane-splitting, or endorsement argument shows up, as an attempt to push your percentage higher.

Insurance. Indiana requires minimum liability limits of 25/50/25: $25,000 per injured person, $50,000 per crash, and $25,000 for property damage, with the property-damage floor having taken effect July 1, 2018.¹¹ Every new auto policy must also include uninsured and underinsured motorist coverage unless you reject it in writing, with UM at $25,000/$50,000 and UIM at a $50,000 minimum.¹² For a rider hit by an underinsured driver, that UM/UIM coverage is often what actually pays.

Damages. Indiana does not cap compensatory damages in an ordinary crash case. Punitive damages are capped at the greater of three times compensatory damages or $50,000, and 75 percent of any punitive award goes to a state victims' fund rather than to you, under Indiana Code 34-51-3-4.¹³

If you need the official police report, Indiana routes crash reports through the Indiana State Police, and our Indiana crash report page walks through getting a copy.¹⁴ If your bike lost resale value even after a solid repair, that is a separate claim covered on our Indiana diminished value page. And when the injuries or the fault fight are serious, you can find an Indiana attorney who handles motorcycle cases.

Knowing which rules applied to your ride, from the helmet law to how you were positioned in the lane, puts you in a stronger spot to answer the insurer's questions and protect what you are owed.

This article is general information, not legal advice.

Sources

1. Indiana Code 9-19-7-1, Minors; protective headgear and face shields (Indiana General Assembly). https://iga.in.gov/laws/2026/ic/titles/9#9-19-7-1

2. Insurance Institute for Highway Safety, Motorcycle helmet use laws (table, July 2026). https://www.iihs.org/topics/motorcycles/motorcycle-helmet-laws-table

3. Indiana Code 9-21-10-6, Traffic lanes; restrictions on use (Indiana General Assembly). https://iga.in.gov/laws/2026/ic/titles/9#9-21-10-6

4. Indiana Bureau of Motor Vehicles, Motorcycle endorsement. https://www.in.gov/bmv/licenses-permits-ids/learners-permits-and-drivers-licenses-overview/motorcycle-learners-permit/motorcycle-endorsement

5. Indiana Bureau of Motor Vehicles, Motorcycle learner's permit. https://www.in.gov/bmv/licenses-permits-ids/learners-permits-and-drivers-licenses-overview/motorcycle-learners-permit/

6. National Highway Traffic Safety Administration, Motorcycle safety. https://www.nhtsa.gov/road-safety/motorcycles

7. Insurance Institute for Highway Safety, Fatality Facts 2024: Motorcycles and ATVs. https://www.iihs.org/research-areas/fatality-statistics/detail/motorcycles-and-atvs

8. Indiana Criminal Justice Institute, Crash statistics and Indiana Crash Facts. https://www.in.gov/cji/research/crash-statistics/

9. Indiana Code 34-11-2-4, Injury or forfeiture of penalty; two-year limitation (Indiana General Assembly). https://iga.in.gov/laws/2026/ic/titles/34#34-11-2-4

10. Indiana Code 34-51-2-6, Comparative fault; 51 percent bar (Indiana General Assembly). https://iga.in.gov/laws/2026/ic/titles/34#34-51-2-6

11. Indiana Code 9-25-4-5, Minimum financial responsibility limits (Indiana General Assembly). https://iga.in.gov/laws/2026/ic/titles/9#9-25-4-5

12. Indiana Code 27-7-5-2, Uninsured and underinsured motorist coverage (Indiana General Assembly). https://iga.in.gov/laws/2026/ic/titles/27#27-7-5-2

13. Indiana Code 34-51-3-4, Limitation on punitive damages (Indiana General Assembly). https://iga.in.gov/laws/2026/ic/titles/34#34-51-3-4

14. Indiana State Police, Crash Reports. https://www.in.gov/isp/crash-reports/