The state transportation department says it will open the new southbound 390 on-ramp from East River Road on Wednesday.
That means starting Thursday, left turns from southbound West Henrietta Road to 390 southbound will be prohibited. Instead, southbound traffic will have to turn right on East River Road and use the new ramp.
In addition, the new auxiliary lane that is being constructed on I-590 northbound at the I-390 southbound split opened this past weekend. Travelers accessing the expressway from East Henrietta Road will have an additional 2,000 feet to merge onto I-590. New overhead signs have been installed to guide traffic.