North-south route will be shut for days

Interstate 5 between Los Angeles and the San Joaquin Valley has been shut down repeatedly over the years by snow, ice, brush fires and serious accidents.

Usually the road is reopened within a few hours. But not this time.

Friday night's fiery tunnel crash is expected to leave the critical route between Northern and Southern California closed until at least Tuesday, Caltrans officials said. Only two massive temblors, the Sylmar and Northridge earthquakes, have halted traffic on the route for a longer time.

"This is a highly unusual event for such a critical area," said Douglas Failing, the Caltrans director for Los Angeles and Ventura counties.

I-5 is the primary north-south route for trucks ferrying goods to and from Mexico, Canada and the West Coast's six primary seaports, the largest being Los Angeles-Long Beach. It is a main artery for transporting produce from California's Central Valley and wood from Pacific Northwest forests. It moves commuters from fast-growing suburbs in the Santa Clarita and Antelope valleys to work in the Los Angeles Basin.

Hasan Ikhrata, planning director for the Southern California Assn. of Governments, said the economic impact of the closure is likely to be huge.

"The goods moving on the freeway are significant," he said. "The hours of delay [for drivers] will be in the millions."

Every day, motorists make nearly 225,000 trips along the stretch of road where the I-5 intersects the 14 Freeway. The figure includes some 20,000 trips by commercial trucks.

Because of all the freeway connections, the I-5 through the area can back up as big trucks and cars compete for space. The truck bypass lanes where Friday's accident occurred are intended to separate the slower-moving trucks from cars heading up or down the Newhall grade.

But even with the truck diversion, traffic along the vital stretch of pavement is getting so heavy that Caltrans officials fear it could become the region's worst bottleneck in the next 20 years, particularly if several large residential development projects now being planned are built.

Up to now, nature has been the freeway's biggest enemy.

Twice in the last 36 years, major earthquakes have brought down I-5 overpasses in the same general area as Friday's accident. The Northridge quake in January 1994 caused two 80-foot-high bridges at Gavin Canyon to collapse, about two miles from the 14 Freeway. It took four months to reopen the freeway that time.