A temporary chicane is being created in Toulston Lane in Tadcaster, near the crossroads with Rudgate, in an attempt to reduce the number of accidents.
There have been four collisions resulting in personal injury since November 2014, one of them fatal.
As a result, North Yorkshire County Council officers have said they will be testing the effect of a speed-reducing chicane on Toulston Lane, which started last Thursday.
The temporary chicane, which will be created using water-filled barriers, will be in place for at least six weeks.
It is expected to reduce approach speeds on Toulston Lane to make the crossroads safer for all road users.
The County Council’s Executive Member for Transport, Coun Don Mackenzie, said: “The idea is to reduce traffic speeds to make things safer at this junction.
“Its effectiveness will be monitored and if successful it will be followed by permanent measures.
“The temporary arrangement should cater for all traffic, but the purpose of the trial is to ensure the spacing of the build-outs forming the chicane is suitable for this location.”