Spring thaw travel restrictions: rules by state and province

Seasonal spring thaw travel authorization and the zones, dates, and times defining reduced-load periods.

18 facts from 1 place, each quoted from the agency that sets it.

Start with a question

Open a question to read the facts on file that bear on it.

What thaw zones apply, and when do their restriction periods begin and end?Nothing on file answers this yet.
At what clock times do spring thaw restrictions take effect and expire?Nothing on file answers this yet.
May published thaw-period dates change in response to weather conditions?Nothing on file answers this yet.

7 topics

Whether circulation is authorized during the spring thaw period, during which permitted axle and gross vehicle loads are reduced on all public roads.

Calendar date on which the spring thaw load-restriction period begins in the zone concerned, as published annually by the road authority.

Calendar date on which the spring thaw load-restriction period ends in the zone concerned, as published annually by the road authority.

Clock time at which the spring thaw load-restriction period begins on the start date, expressed in 24-hour HH:MM format.

Clock time at which the spring thaw load-restriction period ends on the end date, expressed in 24-hour HH:MM format.

Identifier of the thaw zone to which the start and end dates apply, as designated by the road authority.

Whether the start and end dates of the spring thaw load-restriction period may be moved earlier or later depending on weather conditions.