By 1921, Falls Road had been surfaced in macadam from Padonia Road to Ridge Road south of Shawan and then in concrete the remaining distance to Shawan. That same year, the Maryland State Roads Commission planned to reconstruct Falls Road in Baltimore from 36th Street south to North Avenue; that stretch was paved with concrete by 1923. The portion of Falls Road from Butler to Whitehouse, which was then known as Blackrock, was planned as part of an extension of Park Heights Avenue via Butler Road and other highways east of Reisterstown as early as 1910 and as late as 1921. Starting in 1924, Falls Road was paved with concrete north from Shawan. The improved road reached a spot north of Butler by 1927 and to Whitehouse in 1928. The concrete highway was extended to Gunpowder Road in 1930 and to its present terminus at Beckleysville Road by 1933.