AN underground link from the east of Bristol to the city centre has been put forward as a possible option to ease transport congestion.
The idea is included in the draft West of England Joint Transport Study, which will be finalised this month.
The report says the existing road network will not be able to cope with increased demand and a "mass transit system" might be needed.
More immediately, the plans include another park and ride at Warmley, close to the ring road and the A420, as well as park and rides at Emersons Green and at the top of the M32.
The West of England Combined Authority, made up of Bristol City Council, South Gloucestershire Council and Bath & North East Somerset Council, is looking at the business case for a number of road improvements.
Professor Steve West, interim chairman of the Local Enterprise Partnership, told a WECA meeting it would be vital to work together for the best solutions.
“We can’t resolve 50 years of missed opportunities and poor thinking and planning across our city region all at once. We now have the opportunity to be very radical and ambitious about the future. This is the start,” he said.