Twelve jobs could be axed after councillors agreed to use machines instead of people to take money at a toll bridge.
Southampton City Council said it believed the plan for Itchen Bridge would save £238,000 per year.
The idea was agreed by the cabinet on Monday night with the decision expected to be rubber-stamped at a meeting of full council in February.
Work to install the new system is expected to start in May.
It will use infra-red lights to detect the size of each vehicle and charge it the relevant fee.
A manager and a number of staff will remain on site to provide assistance.
The council is in talks with unions over the potential job losses.