then at Elwood Avenue, east to Rossville in Baltimore County, and from Perryville to Elkton. The highway was paved as an wide tarred macadam road from Elwood Avenue to Herring Run in 1910. The remainder of the road from Herring Run to Rossville was completed in concrete by 1921. In Cecil County, the Philadelphia Road was paved with a wide macadam surface from the eastern town limit of North East to the western town limit of Elkton in 1913. The highway was paved in concrete from Perryville to Principio Creek and in macadam from there through Charlestown in 1914. The state road was paved in macadam from Charlestown to North East, including Cecil Avenue within the latter, in 1915. The section of the state road through Charlestown, which is now MD 267, was bypassed with a concrete road that remained on the north side of the Pennsylvania Railroad by 1921. The section of the Post Road between Bel Air Avenue in Aberdeen and the former racetrack in Havre de Grace, much of which is now MD 132, was paved under the state aid system as a wide macadam road by 1911. The first section of the gap between Rossville and Aberdeen was filled with a concrete road from Bradshaw to Winters Run by 1921. The remainder of the highway in Baltimore County and the section from Winters Run to Bynum Run were paved in concrete by 1923. The final piece of Philadelphia Road in Harford County was completed as a concrete road from Bynum Run to Aberdeen in 1926. The highway was paved in concrete along Main Street and Delaware Avenue through Elkton, with the exception of a gap at the west end of town, by 1923. The gap between Elkton and the Delaware state line was filled in 1925. The gap at the west end of Elkton was left in inferior condition in anticipation of a grade separation of the Pennsylvania Railroad. This grade separation and its approaches was completed in 1929, completing US 40, which had been assigned to the length of the Philadelphia Road in 1927. Improvements and construction of Pulaski Highway Improvements to US 40 began shortly after its designation. The highway was widened to in width from Baltimore to Rosedale and from Aberdeen to Havre de Grace, and to between Rosedale and Aberdeen, by 1930. US 40 was also widened to from Perryville to the