Check current conditions along a major California highway corridor.

The flagship trip-check tool: give it a start and end place and it
returns everything active along that stretch right now - CHP incidents,
lane closures physically in place, chain controls, and wildfires within
~10 miles - ordered by miles from the start, plus a summary.

ALWAYS pass from_coords and to_coords ("lat,lon") when you know where
the places are - for landmarks, small towns, or anything not a major
city they are required for a good answer. Coordinates do two things:
they let unlisted places resolve to the nearest corridor (e.g. "Alice's
Restaurant" snaps to I-280 on the Peninsula), and they CLIP the route to
the span actually being driven, so a trip to a mid-corridor destination
doesn't report events beyond it.

Corridors covered: I-80 Sacramento-Reno, US-50 to South Lake Tahoe, I-5,
US-101, SR-17, SR-99, SR-1, I-15 to Vegas, Bay Area freeways, Tahoe-area
routes. This is NOT a general router: if nothing matches (even with
coordinates), the response lists the covered corridors; fall back to the
filtered tools with center= for anything else.

Freshness: CHP incidents refresh about once a minute; closures, chain
controls, and fires are on a 5-minute cache. Current conditions only -
this cannot forecast tomorrow's weather or closures.