Re: There are cheaper, less environmentally harmful options.
Hmm. Check out "America's 100 Deadliest Highways" at thedailybeast. Ranked by number of fatal accidents per in-state miles, sunny California came in #4 (Interstate-15), #5 (I-10), #16 (I-80), #32 (I-5), #40 (I-8), and #79 for I-40. The California freeway system is high risk.
A dated study (2002) titled An Analysis of Traffic Deaths by Vehicle Type and Model did find that the category 'Imported Luxury Cars' (ex: BMW 3-5 series, Mercedes C and E, Infiniti) had the lowest combined risk for fatal highway crash. I suppose that's the category most applicable for the Tesla S.
If someone wants to dig deeper look at the Fatality Analysis Reporting System at http://www.nhtsa.gov/FARS