The Iowa DOT is working to provide more training on the layout and construction of handicapped curb ramps. Toward that end I found a two part video on building curb ramps made by Armor-tile that I thought was worth sending out.
Part 1 https://www.youtube.com/watch?v=ybEY43FBQCY&feature=youtu.be
Part 2 https://www.youtube.com/watch?v=gpXfB57bdH4
The videos where made in 2006 in San Francisco so some of the details are not exactly how we do it in Iowa. For example they show using colored concrete and a groove border; plus they cut the warning tile which we don't do.