The A12 Bascule Bridge is closed and traffic is queueing between the B1532 Pier Terrace/ B1532 Parade Road North and Station Square / Commercial Road.
The bridge is currently stuck in the up position.
Abellio, who run the Greater Anglia rail line, has been named Train Operator of the Year at the annual national Rail Business Awards.
Greater Anglia train operator Abellio says it's made real steps in customer service and punctuality in its first year in charge.
Greater Anglia have apologised for the delays that have disrupted services today