An indivisible (for practical purposes) object that, due to its dimensions and/or mass, cannot be transported on a vehicle or vehicles without exceeding the limitations of the dimensions or mass as described in the Road Traffic & Transportation Act 1999 (Act No.22 of 1999).

Any vehicle or a combination of vehicles that, by virtue of itsdimensions or mass, or a combination of both, does not comply with the requirements of the Road Traffic & Transportation Act 1999 (Act No.22 of 1999).

The fees are derived from the user-pay principle. It therefore relates to the compensation by abnormal vehicles for the damage and/or obstruction caused to the road infrastructure

The Road Traffic & Transport Act of 1999 and its regulation Road Traffic & Transport Regulation of 2001, deals with compliance to the Road Traffic Sign, classified as Mandatory signs (blue & white) meaning that - all vehicles above 3500 kg are mandatory to pass to the nearest Weighbridge within the borders of Namibia.

The calculation of the mass fees is based on an involved set of relationships between tyrepressures, wheel spacing and axle loading. As a result, the total accountable damage factor is calculated by means of a computer program based on current engineering practice.

A computerised program operated by a professional engineer and a permit officer calculate the fees. The permit officer with the support of a professional engineer is entitled to calculate the fees.

The permits are issued after approval by the professional engineer. The associated fees are to be settled at the Roads Authority's Natis sub-division before any trip could be undertaken.

All the payments are processed at the Roads Authority's Natis sub-division. The eventual recipient of these payments is the Road Fund Administration (RFA).

The fees form part of the road user charges imposed by the RFA. It is earmarked to fund projects and programs for the preservation and development of the national road network. It is further allocated towards the maintenance ofurban and rural roads; traffic information management, traffic law enforcement, road safetyand related road research programs.

Four different kinds of permits are issued.

The permits are categorised as:

  1. trip permits;
  2. week permit;
  3. month permit;
  4. year permit

Trip permits are issued for a single trip, a certain number of days are given, depending on the distance to be traveled.

The week, month and year permits are all issued to carriers with minor abnormalities.

The mass, the height and width are the criteria used to determine if the applicant will be issued aperiod permit or not.

The period permits are not issued if any axel group is abnormal/overloaded. Furthermore, no period permit is issued if the width of the vehicle is more than 3.1meters or if the height is more than 4.7 meters.

Embargo days refers to official suspension of movement for abnormal vehicles. These days are typically defined as weekend days, public holidays, festive season period, school holidays and special events days.

Below are the conditions attached with abnormal permit. Take note that conditions of abnormal permits are distinct, depending on the dimensions and subjected load.

Conditions for a period permit

Conditions for a trip permit that require police escort.


The Roads Authority's transport inspectors, weighbridge personnel and the Namibian Police officials.

I) Weight bridge personnel:

II) Transport inspectors:

III) Namibian police: