Iran Heavy Vehicle Driving Theory

It authorises driving heavy vehicles such as lorries, tractor units with trailers, and buses used for passenger transport. You generally need to hold a lighter-vehicle licence first. It is the standard credential for professional freight and passenger drivers in Iran.

Yes. Questions are presented with several answer options and you select one. The wording is in Persian and often describes a short road scenario rather than asking for a bare definition, so read each option fully before choosing.

Those figures are set administratively and change from time to time, so they are not fixed here. The licensing authority publishes the current question count, time allowance and pass mark on its official website. Confirm them there before your test date.

Noticeably harder. The rules section is similar, but you also face weight and dimension limits, load securing, air-brake and inspection questions, and hazardous-cargo handling. Candidates who only revise road signs usually fall short on the technical domains.

Begin with signs, signals and markings, since they appear inside scenario questions everywhere else. Then take right-of-way and speed rules. After that, study loading and weight limits, mechanical systems, hazardous cargo, and finally accidents and first aid.

The common failures are confusing priority rules at unmarked junctions and roundabouts, mixing up regulatory and warning signs, and guessing at axle-weight and load-projection figures. Emergency and first-aid questions also catch people who skipped that domain entirely.

Retakes are normally possible, but the waiting period and any repeat fee are set by the licensing authority and can change. The official website states the current procedure. Use the interval to review the domains you failed rather than simply re-sitting.

No, the theory test is knowledge-based. However, some technical questions about brake feel, inspection checks and load behaviour make far more sense if you have sat in a heavy vehicle or watched a pre-trip inspection, so any practical exposure helps retention.

Take them timed and without notes, then review every wrong answer against the underlying rule. Repeat until your scores are stable rather than lucky. Mock tests diagnose gaps; they do not replace reading the regulations themselves.

Bring valid identification and any documents the licensing centre requires, and arrive early. Confirm your appointment details, the current fee and the accepted payment method on the official website, since these administrative details are updated periodically.