There are roughly a half-dozen major safety compromises, and a growing number of lesser ones. The most common safety compromises committed have become common because they reduce the most “running time,” and help create the most “recovery time,” at the end of each “run” of a route.
Especially for Lawyers: Why So Many Wheelchair Tipovers, Part 1
The inclusion of wheelchair transportation on most modes of public transportation became common in the 1970s. Formal requirements for their securement did not emerge until 1991, with the ADA, although industry standards were established much earlier.