Pennsylvania in the US requires an additional $3.5bn in annual funds to maintain its transportation systems, according to a state report.

The state’s Transportation Advisory Committee (TAC) report seeks investments in existing state and local highways, bridge systems and public transit.

The TAC report, which builds on a 2006 study, seeks innovative solutions to handle changes in technology, vehicle efficiency and soaring construction costs.

Funding is expected to help reduce the number of structurally deficient bridges in the US state from roughly 23% to 5% in 20 years.

The grant is also expected to improve pavements, modernise traffic signals, expand and maintain public transit, remove freight bottlenecks and improve safety.