Washington Truck Weight Limits and Permit Sources

At-a-glance summary

Field-level reference data

Use this Washington reference as a working page, not a clearance document. It points to official material and flags the fields where the public source is direct, interpreted, or still incomplete.

Gross field for WA: WSDOT publishes legal vehicle weight tables; gross legality depends on axle count, spacing, and route rather than a single statewide shortcut. On WA, this row is directly supported and marked high confidence. Single-axle field for WA: 20,000 lb single axle reference in WSDOT legal weight materials. On WA, this row is directly supported and marked high confidence. Tandem field for WA: 34,000 lb tandem axle reference in WSDOT legal weight materials. On WA, this row is directly supported and marked high confidence.

Reading the Washington weight table

On a WA load, the field table is useful because it shows both the value and the source strength. That is where many dispatch notes are too thin. Use FHWA Interstate limits together with WSDOT legal weight tables and permit restrictions. WSDOT legal vehicle weight tables are the reviewed Washington source for regular operation.

WSDOT legal weight tables and federal bridge formula should both be checked where applicable. Re-check the table after any distribution change. A WA ticket that was acceptable before loading may not describe the final configuration.

When the WA ticket is almost at a threshold, use the note to identify the controlling category. Gross, tandem, bridge, and posted-route issues should not be blended together.

Permit and route authority in Washington

WSDOT Commercial Vehicle Permits is the permit source named for WA. Use it before treating an over-limit ticket as a dispatch problem that can be solved only with axle adjustment. WSDOT permit conditions and current restrictions should be checked before over-legal movement.

For permit-controlled WA work, record the approved route and the equipment details beside the weight ticket. That makes later review much less ambiguous.

Seasonal, route, and local checks

A Washington dispatch file should name the seasonal source checked when conditions are active. This review records: WSDOT publishes commercial vehicle permit restrictions and current conditions; no separate statewide frost-law figure was confirmed in this review. Use WSDOT current restriction links for route or permit restrictions before travel.

For WA, local limits can appear in places that a statewide field will not show cleanly. Bridges, county roads, work zones, and permit instructions deserve their own check.

Tickets and enforcement notes

The practical Washington follow-up is to read the source named in the citation or agency record. This review lists Official enforcement agency page not separately confirmed in this review; WSDOT and RCW sources were reviewed. and notes: RCW 46.44.105.2 is the reviewed official additional-penalty source; full ticket calculation may require related sections.

Scale-ticket note for WA: Use the ticket to compare axle groups with WSDOT tables and permit terms. For WA, save the ticket because it documents what was measured at the time. Then use the agency source or permit document to decide what must happen next.

Where Washington still needs judgment

The WA review pulls together 6 source records and leaves a visible confidence count: 13 high, 15 medium, and 1 low. That count matters because truck weight decisions often blend a stable federal concept with a state permit office, route condition, or enforcement source.

Do not hide uncertainty in the dispatch note. If the source is direct, say so. If the source is interpreted, keep the official link with the calculation. If the source is low confidence, note which current agency or route page was checked before movement.

Building a Washington source file

Treat this WA page as the state note in a larger route file. Add comparison tables, agency source pages, scale tickets, and permit documents when they affect the movement. If the dispatch review spans more than one state, pair WA with axle-weight comparisons, permit-office contacts, seasonal status notes, and fine-source summaries.

A workable WA review note can be one paragraph if it names the current ticket, the official source, the route, and the controlling row.

A ticket-reading problem fits How to Read a CAT Scale Ticket. A distribution problem fits How to Slide Tandems. A spacing problem fits Bridge Formula Explained.