What is an HOT lane?
HOT is an acronym for High Occupancy/Toll. HOT lanes are carpool lanes that allow use by single occupant vehicle drivers who have paid a toll. HOT lanes are designed to increase the use of carpool lanes when these lanes are not being used to their full capacity. At times carpoolers are not charged a toll when using HOT lanes. HOT lanes are currently in operation on Interstate 15 in San Diego and on State Route 91 in Orange County.