California DMV Road Signs & Knowledge Test Exam Guide

It says you may never drive faster than is safe for current road conditions, whatever the sign shows. That makes the posted figure a ceiling for good conditions rather than an entitlement, so a citation for driving 65 in a 65 zone can stand in heavy rain — no lower sign has to be posted first, and no crash has to occur.

65 mph on most California highways, and 55 mph on a two-lane undivided highway or when towing a trailer — either of those two conditions alone produces the lower figure. Near schools it drops to 25 mph within 500 feet while children are outside or crossing, and some school zones are posted as low as 15 mph.

Not if the bus is on the other side. California's exception covers a divided or multilane highway — two or more lanes in each direction — and requires no physical barrier at all. That is broader than most states, several of which demand a raised barrier or a median of a stated width, so a driver arriving from elsewhere can be wrong in either direction.

Only when both conditions are met: the children are safely across the street and the red lights have stopped flashing. Either one alone is not enough, so lights still flashing keep you stopped even after the last child you can see has crossed — the bus driver can see the front of the bus and the far kerb, and you cannot.

0.01 — the strictest under-21 figure in common use, and barely above what a test can resolve. A 20-year-old at 0.02 is therefore in violation despite that reading being a quarter of the adult 0.08 limit. A first offence suspends the driving privilege for a full year, not the six months several other states impose.

You must be 15½ but under 18 — the window is bounded at both ends because this is the under-18 route, and an adult applicant follows a separate path. On the knowledge test you are allowed three attempts before you must reapply, and those three belong to a single application rather than being three separate bookings.