I used to live in the Chicago area, and never much considered going through Des Moines. For whatever reason, I always picked Saint Louis. Saint Louis always got the better of me, from rush-hour traffic to empty pallets falling from an open trailer door at 60 mph to a high-speed car chase (not me, but it affected traffic). It got to the point that I started going I-55 I-72 US-54 I-70. Why I didn't reconsider going through Des Moines is beyond me. But, believe me this: there simply being a single route number would not have made a difference......or would it???