I-5 between the Aliso Creek Rest Area and the San Diego-Orange County line will some nights next week be down to one lane.
The Pomona Freeway is a vital route for trucks moving freight between the ports and distribution centers and warehouses in the Inland Empire.
The freeway has been closed since Dec. 14 when a tanker carrying 8,800 gallons of gasoline caught fire.
Caltrans is directing emergency paving work on southbound I-15 in San Bernardino County east of Los Angeles.
Three rest areas on Interstate 10, two on I-15 and two on I-40 were closed Sept. 24.
The proposed $1 billion High Desert Corridor would be approximately 50 miles long, and would replace State Route 138.
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