The arm of the crane struck the front of the Preston Bus, damaging the top right of the windscreen.
Four passengers were travelling on the bus, but nobody is believed to have suffered serious injuries.
Phil Henry, watch manager at Preston Fire Station, attended the scene along with crews from Penwortham.
He said: “The driver was in a bit of shock but no one was trapped.
“The passengers were escorted off by paramedics.
“We attended the scene but no operations were carried out, we just assisted with the paramedics.
“There were three fire engines and a major incident support unit.
“I do not think there was much speed involved because of the junction.”
A spokesman for the crane’s owners, Emsley Crane Hire Ltd, based in Doncaster, South Yorkshire, declined to comment.
Police closed the road for 45 minutes which caused rush-hour chaos in the area with long queues of traffic being diverted away from the scene by police.
A spokesman for Preston Bus was unavailable for comment.
Commuters were already experiencing long delays caused by roadworks on Fylde Road and a major United Utilities storm water tunnel project.
Category: Accident Report