Self-driving Waymo cars have arrived in Denver.

Right now, they’re mapping out the city with a human driver, prepping to go fully autonomous sometime next year. They’ll pick up and drop off passengers, in some cases replacing Ubers, Lyfts and taxis.

Their presence on the roads is raising big questions: Are they legal? How will they be policed? What do I do in the case of a collision?

For one: They are regulated the same way human-driven cars are, and they are required to follow the law.

“As Colorado law reads, if Waymo can follow all the traffic laws, it can operate in our state,” said Nancy Kuhn, a spokesperson for the Department of Transportation and Infrastructure. “All vehicles must follow road and curbside rules (posted and non-posted).”

Other cities, including San Francisco, Los

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