OSHA 1926.601(b)(4): backup alarms on jobsite vehicles
Under 29 CFR 1926.601(b)(4), motor vehicle equipment with an obstructed view to the rear may not be used unless it has a reverse signal alarm audible above the surrounding noise level, or it is backed up only when an observer signals that it is safe to do so.
Official text
(b)(4) No employer shall use any motor vehicle equipment having an obstructed view to the rear unless: (i) The vehicle has a reverse signal alarm audible above the surrounding noise level or: (ii) The vehicle is backed up only when an observer signals that it is safe to do so.Read the full section on eCFR
(a) Coverage. Motor vehicles as covered by this part are those vehicles that operate within an off-highway jobsite, not open to public traffic. The requirements of this section do not apply to equipment for which rules are prescribed in § 1926.602.Read the full section on eCFR
What it requires, in plain English
- The rule covers motor vehicles that operate within an off-highway jobsite not open to public traffic.
- Equipment covered by 1926.602, such as earthmoving equipment, follows that section instead.
- Vehicles with an obstructed view to the rear have a reverse signal alarm audible above the surrounding noise level.
- Without one, the vehicle is backed up only when an observer signals that it is safe to do so.
Where it shows up on site
- A dump truck backing into a loading area with a dead backup alarm
- A pickup with a loaded bed or trailer blocking the rear view, backing without an observer
- Delivery trucks reversing through a crowded laydown area
Verify on site before you call it
A photo rarely shows every fact a standard depends on. Confirm these in person before treating the condition as a violation:
- Is the vehicle operating within an off-highway jobsite not open to public traffic?
- Does the driver have an obstructed view to the rear?
- Can the alarm be heard above the surrounding noise where workers are?
- Is the machine earthmoving equipment covered by 1926.602 instead?
Typical corrective actions
- Stop the vehicle from backing until the alarm is repaired or an observer is assigned.
- Repair the reverse signal alarm and add it to the pre-use vehicle check.
- Assign an observer to signal the driver in congested or noisy areas.
- Lay out traffic routes that reduce the need to back up.
Common questions
Do all construction vehicles need backup alarms?
Not every vehicle. 1926.601(b)(4) applies to motor vehicle equipment with an obstructed view to the rear. Those vehicles need a reverse signal alarm audible above the surrounding noise level, or must be backed up only when an observer signals that it is safe to do so.
What is the difference between the 1926.601 and 1926.602 backup alarm rules?
1926.601 covers motor vehicles on an off-highway jobsite and doesn’t apply to equipment covered by 1926.602, such as earthmoving equipment. Both rules allow either a working reverse alarm or a person signaling before a machine with an obstructed rear view backs up.
Turn the observation into a notice
Record what the photo shows, confirm the on-site checks above, and identify the responsible company and due date. Use the fillable construction safety notice template or follow aworked example from observation to verified fix. Cirqify can draft the notice from your circled photo for you to review.
Related standards
This guide summarizes federal OSHA construction standards for general information. It is not legal advice. States with their own OSHA-approved plans may set different or additional requirements; see federal and state coverage.