Here are a couple of shots from Google Earth of two locations on US 63 in Columbia. The freeway was opened about 1988 with the new crossing over I-70 complete about 1994. Notice the aberration: the left photo has a railroad grade crossing (speed limit 70 on the freeway). When I saw that, my thought was, "I didn't think anyone did that on new road construction anymore. Only in Missouri." A similar situation exists on US 60 in Springfield, but the crossing existed before the highway was converted to freeway. The right photo shows the interchange at I-70. The freeway conversion of US 63 appears to be an afterthought: too much development happened after the section south of I-70 opened, so the reroute was necessary. Going from one highway to the other is tricky because Clark Road (SR PP, the north I-70 outer road) is always full of traffic.