i found this in the L.A. TIMES "Santa Monica banned road racing after this 1915 accident left the driver and three passengers dead."
Speed has never been the problem, that was sorted out very early, its the handling and braking that took decades to catch up to the performance of the cars!
Stutz or Mercer maybe? I think I see an external fuel tank...but I don't think that narrows it down much considering the year! Is that a FULL Elliptic leaf spring I see off to the right? 4 people though...ALL in a race car??? Hmmm...I wonder were 2 or 3 spectators involved instead of passengers? Bet there was a lot of debris flying down the track...including the engine! I wonder could such an accident be researched thru other old news papers or race records? Like to know what the car was!