sentences:  U.S. Route 1 Alternate (US 1A) may have appeared in 1933 as a second route between Cary and Raleigh; it was cosigned with US 70 on Western Boulevard.Maps cease showing the route by 1936.The first U.S. Route 1 Alternate (US 1A) in Raleigh, was established in 1946 as new routing along Louisburg Road (cosigned with NC 59), then along new road (today's Capital Boulevard) back to Wake Forest Road.