Two years later, construction began on two auxiliary lanes on I-805 southbound from SR 54 to Bonita Road, to improve traffic flow at the SR 54 interchange. In 2010, Caltrans proposed adding high-occupancy toll express lanes between SR 15 and East Palomar Street in Chula Vista. The California Transportation Commission (CTC) awarded $100 million for the work in June 2011, which would be split into two phases at the interchange with SR 54. Work is also underway to add two HOV lanes between SR 52 and Mira Mesa Boulevard; this project also received $59.5 million from the CTC in September 2011. Meanwhile, SANDAG made arrangements to purchase the SR 125 toll road and reduce the tolls, which was hoped to encourage commuters to take that road instead of I-805 and reduce congestion; this would then enable Caltrans to construct two managed lanes instead of the original four.