I've found the pedestrian, bike and motor vehicle congestion information we need to make this a truly useful tool here: http://www.dvrpc.org/Traffic/?

Data dumps are limited to 500 records so I have reached out to get a full dump of this information.

Cross walk update: Every intersection is considered a cross walk so other than analyzing aerial photos there doesn't appear to be a way to get this information.

An aside, after talking with the streets department, cross walk data might not be necessary as the city has made great efforts to ensure traffic control devices show vehicles and pedestrians when it's safe to cross. Painting the cross walk doesn't significantly increase safety beyond those efforts from what I understand. It's important to teach our kids how to safely cross roads, rather than to rely on drivers and white lines.