While this technology can help prevent some percentage of accidents under the existing regime, it will likely lead to some population of drivers putting more faith in the technology and becoming more reckless.

It's hard to say if there will be more or fewer accidents as this becomes prevalent. I'm wary of it by default given the already prevalent incidence of DUI and sleepy driving. Those individuals seem likely to use this as an excuse or crutch. I'd be happy to be surprised.