 The first portion of what was known as Charles Street Avenue to be paved in Baltimore County was west of the center of Towson, from Chesapeake Avenue north to Joppa Road, by 1915.The remainder of the highway in Baltimore County was paved in 1928 and marked as MD 139 by 1933.By 1934, traffic levels were high enough on the highway that the Maryland State Roads Commission recommended widening the road in Baltimore County from to in width.