The first of the Olympics Games lanes is "working well", transport chiefs have said.
The 3.5-mile stretch of the London-bound M4 came into operation on Tuesday as Olympics competitors and officials started arriving at Heathrow Airport.
Scotland Yard is enforcing the Games lane on behalf of the Highways Agency, but Transport for London stressed that the aim is to penalise as few motorists as possible for incorrectly using the section of the motorway.
A spokesman said: "The M4 Games lane is working well and drivers have clearly heard the message that, when operational, these lanes are for athletes, officials and media.
"Our whole approach has been to ensure that drivers are given all the information they need, including clear signage, to comply with these requirements and is not about penalising people.
"If we get through the Games with no or very few penalties then that would have been a success."
The M4 lane is in operation from 5am until 10pm and is part of the Olympic Route Network (ORN), providing an important access route for members of the Games Family including athletes, their officials and equipment arriving at Heathrow for their journey to the Olympic Village. Around 80% of Games Family arrivals are expected to pass through this way.
Copyright Press Association 2012