A public inquiry is under way into plans to upgrade the A1 between Bramham and Wetherby.
More than 130 people have objected to the scheme which would apply to almost seven miles of the road and see it brought up to motorway standard.
The inquiry is expected to last two weeks and will hear evidence from the Highways Agency, Leeds City Council, the A1 Action Group and residents.
Locals are worried about noise and increased traffic levels in villages.
Current proposals for the A1 involve upgrading it between the A64 at Bramham crossroads and the Kirk Deighton interchange.
A new road to carry non-motorway traffic is also planned, along with improved facilities for pedestrians, cyclists, and horse riders.