I was up in Cleveland Ohio for about 17 weeks during the winters of 2002-2006 on company business, where they use lots of salt that is mined right there on Lake Eire to keep the roads clear. Every evening we would drive from downtown Cleveland to the northern suburb where we were staying on I-90. I'm betting we saw 100 deer a night right on the side of the road eating the salt.
Urban deer are a big issue even in OKC. Where Arcadia lake is at NE of Okc, they took a state record archery buck several years back and all the home owners in the area had a screaming fit. Now that they can't grow gardens, bushes, or flowers in their yard, they want the state to do something. When the OWDC said hunting was the only answer, they screamed again, but have since learned to live with them, or now live in walled enclosures ;D