LAS VEGAS (AP) — Travelers heading back to California from Nevada on the last day of the Thanksgiving weekend can expect long delays.

The Regional Transportation Commission Southern Nevada said in a tweet Sunday morning that cars were backed up for 20 miles on I-15 southbound. Heavy traffic on the Sunday after Thanksgiving at the state line near Primm, 45 miles southwest of Las Vegas, is as traditional as the holiday.

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Officials say the delay is partly attributed to the interstate dropping from three lanes in Nevada to two in California.

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Las Vegas Mayor Carolyn Goodman recently called for California transportation officials to widen I-15 to help with the backup that happens around major holidays.

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