The CBI business industry body has warned that the UK's "unreliable" transport network could hold companies back.
Roads, which were considered the worst part of the network, were given a "poor" rating and said to be getting more crowded and unreliable, while the UK's airport capacity was also considered poor.
Train travel was rated satisfactory for its reliability and was said to be improving, with a "satisfactory" capacity.
The CBI called for a promotion of private investment in transport and faster planning procedures. It also called for alternative pricing structures to ease congestion.
The organisation advised the Government to keep the transport budget at the level outlined in the 2007 comprehensive spending review.
CBI deputy director-general John Cridland said: "We need a transport system fit for the needs of the 21st Century - faster, more reliable, and lower-carbon.
"When the upturn in the economy comes, poor transport must not be allowed to hold UK business back. But how do we get there in the current economic climate, and where do we get the money to fund the essential improvements we need?"
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