Proper noun
Carmageddon
(US, California) The anticipated traffic jam resulting from closing a major freeway.
Pneumatic hammers continue the demolition of two lanes of Mulholland Drive bridge over Interstate 405 in Los Angeles as part of what was called Carmageddon, as it required the closure of the freeway for three days in 2011. Source: Internet
Some good news: Natural History Museum of Los Angeles County attendance on the Saturday before Carmageddon was 1,200. Source: Internet
Welcome to Carmageddon 5: The Carmageddoning. Source: Internet