The original Skelly Drive in Tulsa, originally signed as Bypass US 66 and now signed as I-44 and OK 66 (and US 412 on the easternmost segment and hidden ALT US 75 from Sapulpa to Red Fork) and which was signed at different times as US 66, US 75, US 169, OK 33 and possibly others (am I missing any?) was built in the early to mid 1950s. It consisted of 4 narrow lanes, narrow right shoulders and nonexistent left shoulders and terrible geometry and lots of curves. The road was a blast to drive on and a trip to the past, but unfortunately it had become choked with traffic and the highway was literally falling apart (chunks of concrete falling from bridges, sinkholes forming on the mainline lanes, rough pavement) and needed to be replaced. It also had at-grade intersections, a narrow median and even an active at-grade railroad crossing at one time. Now I-44 is a modern, generic 6 lane highway between the Arkansas River and the eastern I-244/US 412 semi-interchange and is very soothing to drive (except for the LLBs who think they are entitled to drive in the left lane at 55 MPH (s/l is 60, should be 65) while the old road was terrifying when traffic levels were high. It's a shame the old Skelly Drive couldn't have been preserved as a historic parkway, but the harsh reality of life meant a replacement, partially on a new alignment was necessary. The old road was cool to drive on one time in light traffic, but I must say that I don't miss it. Are there any old roads in your area that have been replaced that you don't miss?