Three alternate plans were posted at Apex High School, 1501 Laura Duncan Road, from 5 to 8 p.m. Monday. They will also be up at Northwood High School, 310 Northwood School Road in Pittsboro, during the same hours on Tuesday.
State Department of Transportation officials want to formulate a 30-year master plan with short- and long-term ways to deal with expected growth along the corridor in western Wake and eastern Chatham.
Possibilities include upgrading the route to an expressway from U.S. Highway 1 in Cary to the U.S. 64 Bypass east of Pittsboro. Removing a number of stoplights and widening the highway are also options being considered.
Transportation officials said they aim to approve a plan sometime this summer.
No funding has been set aside for the proposed improvements.