Dash cams for truck drivers and where you can legally mount one

The short version

The legal spot on a truck windshield is within 8.5 inches (216 mm) of the top of the area your wipers sweep, or within 7 inches (175 mm) of the bottom of it. Either way, it has to stay out of your sight lines to the road, signs, and signals. That comes from 49 CFR 393.60(e)(1)(ii).

Nobody at the federal level makes you run one. The March 7, 2022 FMCSA final rule that set the bigger mounting zone (effective May 6, 2022) says it does not mandate any device. It just permits them.

The bigger zone applies because 49 CFR 393.5 counts a "driver camera system," and any device with a camera or video, as vehicle safety technology. Antennas and similar gear are still stuck with the 6-inch limit.

Video can also help your safety record. FMCSA's Crash Preventability Determination Program reviews 21 crash types, and number 21 is any truck crash where video shows the sequence of events. FMCSA won't review a crash older than 5 years, so save the clip early.

Audio is where people get in trouble. Federal law (18 U.S.C. 2511(2)(d)) allows recording when one party consents. California Penal Code 632 requires consent from everyone in a confidential conversation.

Why do truck drivers run dash cams?

A car cuts in and brakes, or sideswipes you in a lane change. The first question is who did what. Without video, it comes down to statements, the police report, and the damage. A road-facing camera shows your lane, your gap, the light, and what the other driver did. That only helps if the footage is readable after dark. DashcamRank's page on how dash cams handle night driving collects what owners say about night video, model by model.

The American Transportation Research Institute's report on driver-facing cameras says road-facing cameras are catching on with drivers and carriers mainly because they capture safety events that often clear the driver and carrier of negligence claims. The same report is honest about the other side. Video shows driver mistakes too, and that helps settle cases faster either way. ATRI adds that FMCSA-sponsored research it led found road-facing cameras were drivers' second most preferred in-cab technology.

Most drivers want one for disputed crashes and insurance claims. A rear camera helps with backing and dock damage. Parking mode covers hit-and-runs at a truck stop. And the footage can back up a request to have a crash marked not preventable, which is covered further down.

Which camera setup fits your truck?

Figure out what you need on video first. The brand comes later. When you get to brands, DashcamRank's dash cam buying guide sorts owner-recommended models into shortlists for budget, two-camera, night video, and parking mode setups.

If you're leased on, the camera in the truck is often the carrier's. Read the lease for who owns the footage, who can watch it, and whether you get a copy after a crash. Our 1099 truck driver guide has the other questions worth asking before you sign.

Where can you mount a dash cam on a truck windshield?

The federal rule for a commercial motor vehicle is 49 CFR 393.60(e). A device with vehicle safety technology, which includes a camera, has to be mounted no more than 8.5 inches (216 mm) below the upper edge of the wiper sweep, or no more than 7 inches (175 mm) above the lower edge of it. It also has to stay outside your sight lines to the road, highway signs, and signals.

Measure from the edge of the wiper sweep, not the edge of the glass. The 6-inch rule for antennas in 393.60(e)(1)(i) doesn't apply to vehicle safety technology, so a camera isn't stuck in that smaller strip.

The 8.5-inch number is fairly new. Before the 2022 rule, the upper zone was 4 inches, and FMCSA widened it after years of granting temporary exemptions, according to the Federal Register notice. If an older article, video, or cheat sheet says 4 inches, it's out of date.

State rules can be different. ATRI's report notes that state laws on camera placement conflict, and some treat cars and big trucks differently. The federal rule is the baseline for interstate trucks. If you run mostly intrastate, check your state's windshield-obstruction rule before you stick anything to the glass.

Keep a note of the install with your other equipment records. Our trucking compliance guide covers the recurring checks.

Are dash cams required for truck drivers or fleets?

Not by FMCSA. The 2022 rule that set the mounting zone says it does not mandate any of these devices. It only lets carriers mount them where they work best without blocking the driver's view.

Someone else can still require one. Plenty of fleets put a camera in every truck as company policy, and that's an employment or lease term, not a federal rule. Some insurers run programs tied to cameras or telematics, so ask your agent what the program needs, what data it collects, and whether it changes your premium in writing. Our commercial truck insurance guide covers the rest of the quote prep. Some shipper contracts set equipment requirements too, so read yours before you assume.

What features matter on a truck dash cam?

Car dash cam reviews skip the problems a truck has. You've got a long hood, a big windshield, nights at truck stops, and a dash that cooks in the sun. Read each camera's spec sheet with that in mind.

Start with the picture. You want both lane lines and the hood corners in frame, so check the listed viewing angle and look for sample footage shot from a high mount. For night driving and dark lots, look at the sensor named on the spec sheet and find real night samples, not daytime demos.

Then look at how it saves video. Loop recording writes over old files, and a G-sensor locks the clip after a hard hit, so find out how many locked files it keeps before it starts overwriting. Long days fill a card fast. Check the maximum card size and whether the maker calls for a high-endurance card. GPS stamps time, location, and speed on the video. Find out whether you can turn the speed stamp off, and what your carrier's rule is on it.

Parking mode matters if you sleep at truck stops or sit at docks. Most cameras need a hardwire kit for it. Get one with a low-voltage cutoff so the camera doesn't drain your batteries, and check that the camera and kit handle your truck's input voltage.

Heat kills cheap cameras. Many run on a supercapacitor instead of a lithium battery, and makers usually sell that as the better choice for a hot dash. Either way, read the operating and storage temperature range before you leave it up there all summer.

Last, think about getting the clip out. A phone app, a card you can pull, or a cloud upload all work. What matters is that you can get the file the same day and you know who holds it.

If you want a starting list of standalone cameras before you go through all that, DashcamRank's owner-backed dash cam rankings sort popular models by what owners actually say about reliability, night video, and parking mode. The site itself says it's owner research, not lab testing. Most of those owners drive cars, so check each pick against the truck stuff above.

If you're adding a camera on top of an ELD and other in-cab gear, look at the whole setup first. Some fleet ELD providers sell cameras on the same account. That can be simpler, or it can lock you in. Our ELD guide for owner-operators and trucking software guide compare those bundles.

What about privacy with inward-facing cameras?

An owner-operator pointing a camera at himself in his own truck is a different deal from a company putting one in a company driver's cab. FMCSA rules don't ban driver-facing cameras. 49 CFR 393.5 even lists "driver camera system" as vehicle safety technology. The privacy limits come mostly from state law, your employment or lease terms, and any union contract.

ATRI's report lists why driver-facing cameras aren't used more: privacy concerns, confusion over how video is used and who can see it, and worry that small mistakes will get flagged. The report notes that several systems have a privacy mode that shuts the camera off when the truck has been idle for a set time, is in park, or is turned off.

Audio is where the law gets strict. Under federal law, 18 U.S.C. 2511(2)(d) allows recording a conversation when one party consents. Some states go further. California Penal Code 632 makes it a crime to record a confidential conversation without everyone's consent, and says a recording made in violation of that section isn't admissible in court or other proceedings, except in a case about the illegal recording itself. If your camera records audio and you run through states with stricter rules, keep audio off until everyone in the cab has agreed to it.

If your carrier runs inward cameras, get the policy in writing. It should say when the camera records (all the time, only on events, or only when the truck is moving), whether it records audio, and whether it records the sleeper berth or your off-duty time. It should also say who can watch the video, whether anyone watches live, how long video is kept, and whether you get a copy after a crash.

How does dash cam footage help after a crash or claim?

Video only helps if you still have it. Loop recording writes over old files, so the first job after a crash is saving the clip. Hit the event button, pull the card, or download the file. Don't keep driving on that card.

Make two copies and leave them unedited. Write down the date, time, and location, and check that the camera's clock was set right. Then send the clip to your insurer and, if you're leased on or a company driver, the carrier's safety department. Follow the claim instructions in your policy.

Next, check whether the crash qualifies for a preventability review. Under FMCSA's Crash Preventability Determination Program, you can file a Request for Data Review through DataQs with the police accident report and supporting documents, photos, or videos. FMCSA lists 21 eligible crash types. They include getting rear-ended, getting hit when legally stopped or parked, and any truck crash where video shows the sequence of events. Crashes found not preventable come out of the Crash Indicator BASIC calculation in the Safety Measurement System, though they still show on the website. FMCSA won't review crashes older than 5 years, and its page says these requests are averaging about 90 days because of volume.

A preventability request is different from a request to fix the crash report or an inspection itself. Those go to the state that wrote the record. Since September 18, 2026, states have had to decide them within 21 days, with two levels of appeal. Our DataQs guide covers both kinds of request and the deadlines.

That review is about your safety record. It doesn't decide who pays for the damage, which goes through insurance and the courts. If there's a lawsuit, talk to your insurer or a lawyer before you hand video to anyone else.

How long to keep it is up to you and your carrier. We didn't find an FMCSA rule that sets a retention period for dash cam video. Keep any clip tied to a crash, claim, or ticket until the matter is closed, and follow your carrier's written policy if it has one.

If you're buying the camera yourself, it's an equipment cost like anything else. Put it and any monthly plan into your cost per mile.

Related operating pages

A camera is one piece of running a clean one-truck operation. The one-truck operating guide covers the other systems. The small fleet guide gets into rolling cameras and policies out across several trucks, and the ELD malfunction contingency plan covers the other in-cab device that can quit mid-trip.

Sources

We checked the regulations, agency pages, and statutes linked here on October 19, 2026, and rechecked the preventability and DataQs details on October 23, 2026. We didn't test any camera for this guide. The feature advice is meant to be read against each maker's own spec sheet.

• 49 CFR 393.60, glazing in specified openings (windshield mounting limits)
• 49 CFR 393.5, definitions, including vehicle safety technology
• Federal Register, Authorized Windshield Area for the Installation of Vehicle Safety Technology (March 7, 2022)
• FMCSA, Crash Preventability Determination Program (page last updated December 10, 2024)
• FMCSA, Revisions to DataQs Requirements for MCSAP Grant Funding (April 16, 2026)
• ATRI, Issues and Opportunities with Driver-Facing Cameras (April 2024)
• 18 U.S.C. 2511, federal wiretap law and the one-party consent exception
• California Penal Code 632, recording confidential communications