Where and what can you mount on a windshield?
Commercial drivers and motor carriers now have more flexibility when it comes to mounting dash cams, GPS units, and other safety devices on the interior of their windshields.
As of May 6, 2022, the FMCSA has relaxed its restrictions on where the devices may be mounted and has added to the list of devices eligible to be placed in the area swept by the windshield wipers.
Obstruction rule
Under 49 CFR 393.60(e)(1), there can be almost no obstructions placed lower than 6 inches from the top of the windshield. In 2016, the FMCSA added an exception to allow certain “vehicle safety technologies” to be mounted within the area swept by the wipers, since they need a clear view ahead in order to function properly. This included collision or lane-departure warning systems, transponders, and dash cameras, for example.
Until May 6, such devices had to be placed within 4 inches of the upper edge (or within 7 inches of the lower edge) of the area swept by the wipers. As of May 6, that upper distance has been extended to 8.5 inches, so long as no device obstructs the driver’s view of the road or of highway signs or signals.
More safety tech allowed
In addition, the FMCSA has expanded the definition of “vehicle safety technology” in 393.5 to include almost any “system” or “item of equipment” that uses cameras, lidar, radar, sensors, and/or video to promote driver, occupant, or roadway safety. Examples of eligible devices include:
- Fleet-related incident management systems,
- Performance or behavior management systems,
- Speed management systems,
- Lane-departure warning systems,
- Forward-collision warning or mitigation systems,
- Active cruise-control systems,
- Transponders,
- Braking warning systems,
- Braking assist systems,
- Driver camera systems,
- Attention-assist warning systems,
- Global Positioning System (GPS) devices, and
- Traffic-sign recognition systems.
As a result of the rule changes, many temporary exemptions that were in place for specific device manufacturers — including J. J. Keller & Associates for its road-facing dash cam — are now unnecessary.
Keep safety in mind
When mounting devices on a windshield, keep more than the regulations in mind. Special consideration may be needed for taller drivers or for vehicles with smaller windshields. Make sure drivers can still see the road and highway signs/signals or they could be cited for a violation.
Key to remember
As of May 6, 2022, the FMCSA has expanded the area in which vehicle safety technologies may be mounted on the interior of a windshield, and has expanded the list of eligible devices.