There is no doubt that trikes are somewhat safer than bikes, especially DF bikes. Trikes can be rolled too. However----------------consider this. There are many threads on bike forums about accidents where cyclist were hurt or killed. Even tho the accident was the drivers fault, they and their attorneys try to make the cyclist partly at fault if not wearing a helmet. For this additional reason I always wear a helmet on both my bent bike and trike. Also I have 2 flags on the trike to help put aside the old driver lie "I didnt see him". If you do wear a helmet and put on flags, I feel it goes quite a ways to stop the idea that since I didnt have safety equiptment some how I am partly at fault.