GAWHRATJarnan Trad S.P.C

Speed limiter installation, calibration and certification

ROP-compliant limiting for trucks, buses and commercial vehicles across Oman. Fitted by certified technicians, calibrated to your permitted speed and certified the same day.

Limiting that passes inspection the first time

A speed limiter is only as good as its calibration and its paperwork. We treat all three parts of the job with the same seriousness.

Our technicians install electronic limiters suited to your vehicle's fuel and control system, calibrate them to the limit permitted for the vehicle class and road-verify the result. Every step is recorded against the chassis number.

For fleets, we plan rollouts in batches around your routes and rest days, so compliance never takes vehicles out of service. Renewals are tracked for you and scheduled before certificates lapse.

0140100100KM/HCALIBRATED

Calibrated and road-verified before handover

Vehicles we limit

Requirements differ by class and contract. We confirm the current rule for each vehicle before any work starts.

Heavy trucks

Tractor units, rigids and tippers limited to the permitted class speed.

Buses & coaches

Passenger and staff transport, including school and university fleets.

Plant & specialist

Site and specialist vehicles limited to contract requirements.

Light commercial

Vans and pickups where contracts or policy demand limiting.

1 / 3

Install

The limiter is fitted to the fuel or drive-by-wire system with clean, protected wiring.

2 / 3

Calibrate

We set the device to your permitted limit and verify it against real wheel speed.

3 / 3

Certify

You leave with the official certificate used at registration and inspection.

Official

Speed Limiter Certificate

Certifies installation and calibration in accordance with applicable requirements.

Vehicle No.
4218 MB
Vehicle type
Heavy truck
Calibrated limit
100 km/h
Issue date
12 / 03 / 2026
Certificate No.
GJT-26-04871

Verification code

The certificate that keeps vehicles on the road

Issued on completion, recorded against the chassis and tracked to renewal.

  • Records vehicle, device, calibrated limit and issue date
  • Accepted for registration, renewal and inspection checks
  • Stored digitally, so a lost paper copy is never a crisis
  • Expiry reminders sent before renewal is due

Speed limiter questions

The rules change from time to time. These answers reflect how the process works in practice.

ROP regulations require speed limiters on commercial vehicle categories such as heavy trucks and buses, with limits depending on vehicle type. Requirements are updated from time to time, so we confirm the current rules for your exact vehicle class before installation.

A typical single vehicle is fitted, calibrated and certified in one visit, usually within a few hours. Fleet rollouts are scheduled in batches so your vehicles keep working while we install.

After installation and calibration you receive an official speed limiter certificate recording the vehicle, device and calibrated limit. It is the document used for registration, renewal and roadside or inspection checks.

Yes, certificates are valid for a fixed period and must be renewed. We track expiry dates for our clients and remind you before renewal is due.

Need vehicles limited and certified?

Send us your vehicle list. We will confirm requirements and schedule installation around your operations.

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