Oversize Overmass (OSOM) Period Permits

Information regarding the available period permit types including associated costs, operating conditions, application forms and travel networks and conditions.

OSOM Period Permits allow eligible Transport Operators and their vehicles to undertake multiple oversize or overmass movements without applying for a permit for each individual trip.

Select the permit type below to check eligibility, costs, operating conditions and where you can travel.

Making a single movement? Go to OSOM Single Trip Permits.

Find the right permit

Acknowledgement of Country

The Government of Western Australia acknowledges the traditional custodians throughout Western Australia and their continuing connection to the land, waters and community. We pay our respects to all members of the Aboriginal communities and their cultures; and to Elders both past and present.

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