At the freight sector debate in the Scottish Parliament, Conservative MSP David McLetchie called delays in starting work on a new bridge or tunnel "unforgiveable".
Other MSPs said businesses in Fife are already preparing their exit strategies.
Green MSP Mark Ballard saw the trouble at the bridge as an ideal opportunity to develop rail freight.
Year: 2016 | Body Type: Beavertail | Cab Type: Day | Registration: PF16UBY | Mileage: 254,108 km | Category: Rigids
Year: 2009 | Body Type: Tractor unit | Cab Type: Sleeper | Registration: RN59 FBN | Mileage: 730,855 km | Category: Tractor units
Year: 2020 | Body Type: Tractor unit | Cab Type: Sleeper | Registration: RK20FEH | Mileage: 702,582 km | Power: 12,902 bhp
