route clusters

[agentsteel53]

I've always wondered if CA-52 and 56 were intentionally numbered so to correspond to the other 5x freeway in the area.  was 54 a freeway in the works by the time 52 and 56 were designated?

[Molandfreak]

I can't say there are many clusters of three-digit Minnesota highways, if at all, but I can say there are clusters of numbers very close to each other in a given area. In the quad cities, you have 135 (formerly 35) and 37, which intersect. In the east metro, you have 95, 96, and 97 in the same general area (you also had 94 which was overtaken by U.S. 10, and 98 was formerly in the area as well). In southeastern Minnesota, north of Rochester, 56, 57, and 58 are all north-south highways that appear to be part of a grid; before U.S. 63 came in, MN 59 was part of this "mini-grid" as well.

[NE2]

I've always wondered if CA-52 and 56 were intentionally numbered so to correspond to the other 5x freeway in the area.  was 54 a freeway in the works by the time 52 and 56 were designated?

All three numbers were first used in the 1964 renumbering, so it was probably purposeful clustering.

[hotdogPi]

Keene NH:             NH 9, NH 10, NH 12
Near Albany NY:     NY 85, I-87, I-88, I-90