Route 40 is from Route 15 at Barstow to the Arizona state line near Topock, Arizona via Needles.
Cal. Sts. & High. Code § 340
The State Highway Routes
Amended by Stats. 1981, Ch. 292, Sec. 22.
Official source: California Legislative Information. Reproduced from public-domain California statutes; confirm against the official source for the current text. Not legal advice.