SigAlert
sig-uh-lurtnoun
SlangSoCalDifficulty 2 of 3: Regional
Definition
An official announcement of an unexpected road closure expected to last 30 minutes or more.
In simple English: A traffic warning about a long road blockage.
Examples
There’s a SigAlert on the 405, take surface streets.
Usage notes
Named after Loyd Sigmon, who built the 1950s alert system for Los Angeles radio. A genuine piece of California civic vocabulary — you will hear it on every LA traffic report.
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At a glance
- Track
- Slang
- Region
- SoCal
- Part of speech
- noun