Propose to rename all these categories from "traffic" to "collision". Assuming these incidents are all accidents is a WP:POV, and some of them are definitively not (such as Philip Taylor Kramer or Solomon Mikhoels) or highly questionable (such as Karen Silkwood). The categories listed here are all direct or indirect subcategories of Category:Traffic collisions. Vectro ( talk) 22:18, 6 March 2016 (UTC)
There are non-collision transport incidents that result in significant injury or death. These include falls from motorcycles and overturning cars. I have also seen major injury as a result of spinouts but the vehicle did not collide with anything. A complete set of sister categories for non-collision incidents seems redundant and as a result I cannot support a change to making all these categories collisions. Beeswaxcandle ( talk) 06:33, 10 March 2016 (UTC)