[Rust]

The driver for not paying attention, same as now. A road painting might be a distraction, but it will only panic you if you see it at the last moment - which should only happen if you weren't watching where your speeding, multi-ton, flammable transportation machine was going on a residential street.

[Someone]

Scenario #2: the passenger in the front seat starts paying attention, shouts "Watch Out", grabs the wheel, and causes an accident.

I still think this is a bad idea.