The £50,000 study, which is part of the Henley and Harpsden neighbourhood plan, examined the volume and speeds of traffic using rubber sensor strips on the roads.
About 12 number plate recognition cameras were used to assess how long drivers spent in the town.
Councillor David Nimmo Smith, cabinet member for transport at Oxfordshire County Council and a town councillor, said: “The cameras record vehicles that go past so we can see how many go straight through the town and how many are stopping and how long for.
“The survey should give us a feel of what is happening with hevay goods vehicles as that is something people are concerned about.”
The results will not be published for at least six weeks. It is hoped they will show the effect that 450-plus new homes would have on traffic flows.
Cllr Nimmo Smith said: “The survey is getting the best information on current traffic. That will be overlaid with information from the neighbourhood plan and the movements predicted to see the potential impact.”
The survey was carried out by Peter Brett Associates of Reading.
It follows an intial £1,500 scoping report done by Alax Baxter Associates, of London.
The neighbourhood plan is part of a wider project in Oxfordshire to try to accomodate 100,000 new homes and create 85,000 new jobs by 2031.