Massachusetts in the United States has started replacing 14 bridges on Interstate 93 as part of a programme to reduce the number of deficient structures for which the state is responsible.
The programme’s launch was prompted by the 2007 collapse of the Interstate 35 west bridge in Minneapolis, Minnesota.
Plans for the $91M (£62M) project to replace 14 structurally deficient overbridges were approved by the Massachusetts state government this week.
The project is being funded through the state government’s eight year, £2bn programme to cut the number of structurally deficient bridges by 15%.
Existing insitu reinforced concrete bridges that were built over 50 years ago will be replaced.
The new bridges will be prefabricated modular steel structures that sit on existing abutments. Bridge lengths range from 20m to 105m and will use a common design.