Fellow drivers placed orders for breakfast while Lario's truck was parked in the carpool lane, the Los Angeles Times reported.
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"We saw other people walking down with sandwiches and we were like, 'Where are we going? Let's go get it,'" driver Michael Ullrich told KABC. "So we just walked up here, and there's a lot of great people and we're all hanging out and talking and trying to get through it."
Lario has operated her food truck since 1986. She typically serves construction crews working on a tunnel at Los Angeles International Airport.
"I never thought something like this would happen," Lario told the LA Times.
The eastbound freeway lanes were cleared by 8 a.m. local time, according to KTTV.