 Several projects took place following the completion of the widening project . A realignment project took place in 1994 to remove one of the curves in the San Pasqual Valley , at a cost of $ 2 @.@ 5 million ( about $ 5 @.@ 03 million in 2015 dollars ) . The San Marcos Boulevard interchange was renovated beginning in late 1996 , but encountered difficulties in the land acquisition process . Work resumed in 1999 , and was expected to be finished by 2000 , at a cost of $ 10 million ; the benefits of decreased congestion came into effect once the new westbound offramp was opened . The Twin Oaks Valley Road interchange was another subject of contention , as the state Assembly refused to fund the project with $ 5 @.@ 1 million ( about $ 9 @.@ 02 million in 2015 dollars ) in April 1997 . However , in June 1998 , the California Transportation Commission approved the funding after the San Diego Association of Governments officially requested it . Construction began in August 1999 , and was scheduled to end in 2001 . 
