The entrance roadways to the Historic Area were planned with great care. Even in modern times, pathways from the Colonial Parkway and from the relocated U.S. Route 60 at Bypass Road and North Henry Street are without commercial development. The protected vista was extended along U.S. Route 132 in York County to the new road when Route 143 was built as the Merrimack Trail (originally State Route 168) in the 1930s. When Interstate 64 was planned and built in the 1960s and early 1970s, the additional land along Route 143 from the designated "Colonial Williamsburg" exit was similarly protected from development. Even in modern times, no commercial properties are encountered to reach the Visitor's Center, although the land is very valuable and the distance is several miles.