The RAC said a survey of 2,000 people showed that only 12% supported putting pubs into motorway service stations.
Around two-thirds said they did not agree with the move, with older drivers more likely to oppose the sale of alcohol at motorway service areas.
Only 8% of over-55s were in favour, with 71% against, while almost one in five of those aged between 18 and 34 were in support.
Around one in four of everyone questioned were undecided on the issue.
More top news
Rain for the northwest, dry and cold elsewhere
Rejecting a showdown with Ed Miliband, David Cameron's terms sent to broadcasters reveal his deep dissatisfaction with the debate proposals.
The owners of what some people claim to be the 'Welsh Holy Grail' are offering a cash reward for the ancient artefact's safe return.