For example, let's say the Lancaster Bypass was done in the '70s. It would probably start at about the mall since there weren't any traffic lights between Carroll and the mall until the Meijer opened up in the '90s. None. No houses on W. Fair west of the Campground. It would have hugged the city much more closely and would have re-joined the old road near Memorial Drive and Ford St. where Lancaster Sales used to be.
Mind you, Memorial Dr. was the "original" bypass for 33 around Lancaster. Similar in scope to 23 in Delaware and 16 in Newark. All designed in the late 50s/early 60s then built in the mid 60s.