Load limits coming to Concord roads March 11 as thaw arrives early

With the spring thaw showing up early, Concord will begin posting load limits to streets on March 11 to minimize damage from heavy commercial or construction vehicles.

Seasonal weight restrictions of 9 tons are posted on roads annually. They will probably remain in place through the end of March or early April. Limits will not be removed until all snow has melted and ditches are clear of standing water.

The New Hampshire Department of Transportation put similar posting limits on state roads as of Feb. 26. 

Road structures are naturally weakened this time of year from the freezing and thawing cycles. Fluctuating temperatures can cause the ground to shift, leading to cracks in the pavement. Frost heaves are formed when snow and rain get through the cracks and freeze underneath the roads, expanding the road upwards. As temperatures warm, the ground thaws and the roads contract back down, causing breaks in the pavement and potholes.

The City of Concord does not issue permits for drivers for spring load limits. Drivers can call Concord General Services at 603-228-2737 to request travel permissions if necessary for one or two loads within morning hours.

A list of streets that will be posted and more information can be found online at www.concordnh.gov/springoperations.