Police are enforcing the 2+ lane on the A4174 at Bromley Heath this week.
Today a team of Special Constables and neighbourhood officers carried out an “educational operation” during the morning rush hour.
They stopped and spoke to 76 drivers to advise them about the traffic regulations. Two motorists were given fixed penalty notices.
Checks will take place all this week.
PCSO Katrina Sheldrake, of the Downend and Siston Neighbourhood Policing Team, said: “We’re carrying out the operation in response to calls from the local community to see a police presence on the road.
“On the whole we’ve had a very positive reaction from the public, with drivers applauding and giving us thumbs up signs.”