The board of the National Roads Authority is to be asked to reduce the fee charged to taxis using Dublin's Port Tunnel during rush hours to the off-peak rate of €3.
All cars, including taxis, now pay €3 to use the tunnel at off-peak hours, or €10 during rush hours.
Buses and trucks go free.
NRA chief executive Fred Barry agreed to put the issue to his board, after pressure for such a move from TDs at the Oireachtas Transport committee.
