Original sentence: MD 4 was routed to follow much of MD 2 in Calvert County by 1975 and in subsequent years, this portion of the route would be built into a divided highway.The designation MD 2 was first used by 1927 for the road running between Solomons Island and Baltimore
Edited sentence: MD 4 was routed to follow much of MD 2 in Calvert County by 1975, and in subsequent years this portion of the route was upgraded to become a divided highway.The designation MD 2 was in use by 1927 for the road running between Solomons Island and Baltimore