As somebody who did try to get a crosswalk near my home, I can say with some degree of certainty that calling the local DOT is generally a lost cause.
A bit of backstory... My little cluster of townhomes sits beside a 35mph, wide (was 4 lanes, reduced to 2+bike lanes), busy suburban road. Cars regularly go 50mph because the road is wide and smooth and 50 feels right. People have died crossing the road (2 in the 7 years I've lived here). There's a bus stop on both sides of the intersection, housing on both sides, a park on one side down a block, and a golf course on the other side, also one block down.
The response from VDOT was essentially "there's currently no proof of pedestrian need" This despite bus stops, parks, and housing existing. And pedestrian deaths. And frequently seeing with my own eyes people dashing across the road, trying not to get squished,
It's complete idiocy from the various traffic planning orgs. It's 100% car-first, consequences be damned. Bike lanes are added reluctantly, and usually as a requirement to get federal funding; little attention paid to utility... did I mention the bike lanes on the road above go "nowhere"? They literally end several blocks on either side of the local school complex, start again, then stop before the local shopping center. So you can't actually use them to get anywhere you'd want to go.
"there's currently no proof of pedestrian need"
Well of course. Just how there's no proof of "train need" before tacks get built. Why do we ever build tracks if there is no preexisting train traffic to justify the need?!