A motorist fears a serious accident could happen at a busy double junction because drivers are ignoring no right turn signs.
Michael Bentley, of Beech Hill, raised concerns about cars pulling out and turning right from the BP garage, in Scot Lane, Marsh Green, despite site owners Euro Garages having a no right turn policy.
The 62-year-old grandfather said he had already witnessed a collision on Scot Lane, heading towards DW Stadium after a car had turned into two lanes of traffic and is calling for motorists to take heed of signs.
He said: “With traffic building up around that area, there is more chance of an accident happening and it is getting dangerous.
“I quite often see near misses and scrapes when cars turn right as there are two lanes. I have seen drivers letting people out to turn right, but unfortunately there are cars coming on the far right side.
“On the exit from Subway the road actually is not dual carriageway until after the exit and is a bit misleading as to whether cars should overtake not.
“If one of the vehicles in the next collision is a motorbike then the chances of a death would greatly increase.”
The former Heinz worker added that he saw a collision last week and warns drivers to take extra care when turning tight.
He said: “I saw two police vehicles surrounding a 4x4 car which had been smashed up on the far right lane.
“Luckily no-one was hurt but it could have been a lot more serious. People should be turning left only, towards Beech Hill. If they need to go to Robin Park, they should turn around elsewhere - maybe Martland Mill.”
A spokesman for BP Garage said site owners Euro Garages has signs to insist drivers turn left only and will ensure they are more prominent.
He said: “BP has met with Euro Garages, who own and independently operate this site, and discussed this issue. Euro Garages has signage at the exit asking customers not to turn right and an operations team will be following up to ensure the signage is both clear and in place.
“Euro Garages are open to working with Wigan Council and Highways teams to identify further improvements that may help to improve safety at this location.”