Which can be a failure in itself when you spend 10 years and tens of billions building something “perfectly” only for it to break on its maiden voyage. That makes you wonder what was the point of doing everything so methodically when they could have taken a more efficient and iterative approach.
There aren’t. Mercedes system only works in two states on freeways during the daytime on sunny days at speeds below 40MPH with clearly marked lines and no construction. There are so many qualifiers that it’s basically useless outside of the attention grabbing headlines.