As that work unfolded, a fight broke out between a group of youngsters.
“One young person was arrested following this separate incident and enquiries are ongoing,” Guernsey Police said.
The pedestrian was taken to hospital, but their injuries were not thought to be serious at the time.
The incident happened at about 4.40pm with the road reopened before 5pm.
Officers stopped traffic flow between the Albert Pier and the roundabout by the Slaughterhouse.
Buses were queued up at the Slaughterhouse End with the stands cleared while the situation was dealt with.
