I visited my alma mater, University of Arizona, last week. Arlington residents should be aware there have been a HUGE number of bicycle accidents related to streetcars and streetcar tracks along streetcar routes in Tuscon over the past two years. Most of the accidents have not been reported but of those that have been reported many were serious and involved veteran bicyclists. The data were collected by a non-profit bicyclist and pedestrian advocacy group, the Living Streets Alliance. Based on 86 reported accidents the group determined that there were several causes of accidents resulting from streetcars and streetcar tracks and bicyclists, the most common being bicyclists crossing streetcar tracks at a bad angle. Another big cause of bicyclist injures was bicyclists having to veer into streetcars or get caught in streetcar tracks while avoiding some obstacle. Latest consensus opinion among bicycle groups is that bicycles should not share streets with streetcars.
Anyway, you can see for yourself by searching "Tuscon bicycles streetcars accidents" on the Web.