Short answer: California bans almost anything stuck to a windshield, then lists exceptions. A phone used as a dashcam has to squeeze into one of two: the portable GPS exception, which covers navigation and nothing else, or the video event recorder exception, whose definition describes a device that loops and keeps only short clips around a jolt. A phone recording the whole trip to storage matches neither description. The mount that does not depend on matching a definition sits below the glass, on the dash or a vent, clear of your view.
I owe this piece to a correction. Our own roundup of Android dashcam apps talks about a sunlit windshield mount as if the windshield were simply where the phone goes, and an older list of ours suggests a vent or windshield mount in the same breath, as though the two were interchangeable. The heat advice in those pieces holds up. The placement advice skipped a question that the vehicle code answers before any battery or heat question gets a turn: is the thing allowed on the glass at all?
I read three texts to find out: California's windshield section, Minnesota's, and the federal rule for commercial trucks. They disagree with one another in ways that are useful to see side by side. None of what follows is legal advice, and I am not a lawyer. It is a close reading of short statutes, aimed at people whose dashcam happens to be a retired phone.
California starts from a flat ban
The first sentence of California Vehicle Code section 26708 is about as broad as a traffic rule gets: "A person shall not drive any motor vehicle with any object or material placed, displayed, installed, affixed, or applied upon the windshield or side or rear windows." A second sentence then reaches past the glass to anything in the cabin that "obstructs or reduces the driver's clear view through the windshield or side windows". So there are two separate questions for a phone on a mount. Is it on the glass? And wherever it is, does it cut into what the driver can see?
Everything else in the section is a list of exceptions to the first sentence: mirrors, sun visors, a toll transponder in a small square at the top centre, certain stickers in the lower corners. Two of the exceptions are the ones a phone owner reaches for.
The GPS exception. A portable GPS may sit in a seven-inch square in the lower corner farthest from the driver, or a five-inch square in the lower corner nearest the driver and outside an airbag deployment zone, "if the system is used only for door-to-door navigation while the motor vehicle is being operated". That condition is the whole point. A phone mounted there and showing turn-by-turn directions is the case the paragraph was written for. A phone mounted there with the screen off, recording the road for the whole trip, is doing a different job, and the paragraph does not describe it.
The video event recorder exception. This is the paragraph people mean when they say California allows dashcams on the windshield, and it allows the same two lower-corner squares plus a five-inch square at the top centre. But it comes with its own definition. A video event recorder, for this section, is "a video recorder that continuously records in a digital loop, recording audio, video, and G-force levels, but saves video only when triggered by an unusual motion or crash or when operated by the driver to monitor driver performance". The same paragraph then caps what such a device may store at no more than thirty seconds either side of a triggering event, requires a notice posted where passengers can see it stating that "a passenger's conversation may be recorded", and adds: "The registered owner or lessee of the vehicle may disable the device."
Read that definition against how a phone is typically set up for dashcam duty. Most people start a recording when they pull out and stop it when they park, and the file is the trip. The definition describes something else: a rolling buffer that is thrown away unless a jolt, a crash or the driver's own button tells it to keep a short clip. Whether a phone app that does loop and trigger, and caps what it keeps, could fit the paragraph is a question I could not settle. I found no California guidance that applies the definition to a phone app either way. What I can say from the text is that a phone recording continuously to storage is not what the definition describes, so leaning on this exception for it is a bet, not a reading.
The phone law already names a better spot
California has a second statute that matters here, because it is written about phones rather than cameras. Section 23123.5 is the hands-free rule. It lets a driver operate a phone by hand only if the phone is mounted on the windshield in the same manner as the portable GPS above, or is "mounted on or affixed to a vehicle's dashboard or center console in a manner that does not hinder the driver's view of the road", and only for a touch made "with the motion of a single swipe or tap of the driver's finger".
That statute is about touching the phone, not about recording with it, so it does not settle the windshield question for a dashcam. What it does is name, in so many words, the place the legislature expects a phone to live in a car: on the dashboard or the centre console, out of the way of the road. A phone mounted there is off the glass, which takes the first sentence of section 26708 out of play, and leaves only the clear-view test, which any placement has to pass anyway.
Minnesota asks a different question
Minnesota Statutes section 169.71 is not built around things stuck to the glass. Its prohibition is on driving with "any objects suspended between the driver and the windshield", followed by a list of exceptions. Two of them look relevant. One covers "driver feedback and safety monitoring equipment when mounted immediately behind, slightly above, or slightly below the rearview mirror". Another covers "global positioning systems or navigation systems when mounted or located near the bottommost portion of the windshield".
So the Minnesota map is close to the reverse of California's. California's camera exception offers the lower corners and the top centre; Minnesota's monitoring-equipment exception points at the mirror, and its navigation exception points at the bottom of the glass. A phone recording the road from behind the mirror might count as driver feedback and safety monitoring equipment. The statute does not define that phrase in the subdivision I read, and I found nothing that applies it to a phone, so this is an open question rather than a permission.
The broader lesson is that a mount position that is fine in one state can sit outside the exception in the next. A suction cup moves easily. The statute it has to satisfy does not move with it.
Trucks get the clearest rule, and it names cameras
The federal rule for commercial motor vehicles, 49 CFR 393.60, is the most explicit of the three, and of the texts I read it alone names cameras in its definitions. Ordinary windshield devices on a truck have to sit high, outside the wiper sweep, and "outside the driver's sight lines to the road and highway signs and signals". Devices that qualify as vehicle safety technology get their own placement limits instead, measured from the wiper sweep: one reaching eight and a half inches down from its top edge, one reaching seven inches up from its bottom edge, and the same sight-line test on top.
The definition of vehicle safety technology, in 49 CFR 393.5, lists a "driver camera system" among its examples, and closes by saying it includes "systems and devices that contain cameras, lidar, radar, sensors, and/or video". California's own section borrows that federal definition for the commercial vehicles it lists elsewhere in its code. None of this governs a private car. It is worth reading anyway, because it shows what a regulator writes down when it sets out to permit windshield cameras deliberately: a band measured from the wipers, and a sight-line test that applies to every device regardless of what it is.
What I would check before the mount goes up
- Read your own state's windshield section. Every state I looked at has one, and they are short. Search for your state's vehicle code together with the words windshield and obstruction, and read the list of exceptions in full rather than a summary of it.
- Work out which exception your setup would claim, if any. If the answer is the GPS one, the phone has to be navigating. If it is a camera exception, compare the statute's definition with what your recording app is set to do, not with what the device is called on the box.
- Prefer a dash or vent mount for recording. Off the glass, low, and outside the arc of road you scan while driving. In California that position is named outright in the hands-free statute, and it avoids the definitional question entirely.
- Treat cabin audio as its own decision. California puts a passenger notice on its camera exception for a reason. If you leave the microphone on, the people riding with you should know.
- Start and stop the recording before the car moves. In California a touch while driving is limited to a single swipe or tap, and a phone mid-setup on a mount invites more than that.
What I could not verify
- Whether California enforcement treats a phone running a loop-and-trigger app as a video event recorder. The definition is functional and says nothing about the hardware; I found no ruling or guidance either way.
- What Minnesota counts as driver feedback and safety monitoring equipment. The phrase appears in the exception without a definition in the subdivision I read.
- The other forty-eight states. I read two states and one federal rule. I would rather say that plainly than imply coverage I did not do.
The texts quoted are the published versions I fetched: California's section 26708 as amended with effect from January 2026, its hands-free section as current at the start of this year, Minnesota's current statutes, and the federal regulation as shown on eCFR this month. Statutes change, and a mount usually outlives the version of the law that was in force when it went up.
Try it: Background Camera RemoteStream on Google Play -- record with the screen off and keep the footage on the phone. Setup notes and other write-ups are at superfunicular.com.
Sources. California Vehicle Code section 26708 on Justia, California Vehicle Code section 23123.5 on FindLaw, Minnesota Statutes section 169.71 from the Revisor of Statutes, the federal glazing rule at eCFR and the federal definitions section at Cornell LII. Quotations are verbatim statutory and regulatory text as published. The glass in front of the driver belongs to the driver first, and the statutes read as if they were written by people who had sat behind a badly placed mount.
Top comments (0)