 The state highway was extended to Persimmon Creek in 1933 and to Delabrooke Road north of Oraville in 1934.The final section of MD 6 was completed from Delabrooke Road south to MD 235 in Oraville in 1940.The first improvement project on MD 6 was between Doncaster and Hilltop when the gravel road was rebuilt and received a wide bituminous surface.