The California Department of Transportation  (Caltrans) plans to close the lanes, ramps and connector listed below as part of a $140 million improvement project to construct High Occupancy Vehicle (HOV or carpool) lanes and a direct HOV lane connector at the I-5/SR-170 interchange. Ramp closures will be staggered. Closures are subject to change. Detours will be signed.
For the safety of the construction crew and motorists, please be attentive to closures, slow for the cone zone, and move over one lane where possible.
Lane closure information for this and other freeway projects is available on the Caltrans website: http://www.lcswebreports.dot.ca.gov/lcswebreports/ 
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Golden State Freeway (I-5) Lane Closures
Tuesday, May 21, to Friday, May 24
Paxton Street on-ramp to northbound I-5
TIME: 9 a.m. to 3 p.m.
Up to four lanes of southbound I-5 between SR-118 and SR-170
TIME: 10 p.m. to 6 a.m.
Note: The most restrictive closures (i.e., the most lanes closed) will occur between midnight and 4 a.m.
Eastbound Van Nuys Boulevard on-ramp to southbound I-5
TIME: 9 a.m. to 3 p.m.
Long-term I-5 on-ramp closures:
Westbound Osborne Street to northbound I-5 (opens May 2013)
Eastbound Osborne Street to northbound I-5 (opens June 2013)
Branford Street to southbound I-5 (opens December 2013)
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Long-term I-5 off-ramp closures:
Northbound SR-170 to Sheldon Street (opens May 2013)
Northbound I-5 to westbound Terra Bella Street (opens June 2013)
Northbound I-5 to eastbound Van Nuys Boulevard (opens June 2013)
- Northbound I-5 to Branford Street (opens July 2013)
About the High Occupancy Vehicle (HOV or carpool) Lane Project
Caltrans is constructing an HOV lane in each direction on I-5 between the Hollywood Freeway (SR-170) and SR-118, a distance of 6.8 miles (3.4 miles in each direction). The project is also widening four undercrossings, replacing sections of pavement, and building a direct HOV connector at the I-5/SR-170 interchange. A direct HOV connector allows for freeway-to-freeway transfers without exiting the carpool lane.
This project will alleviate congestion, encourage carpooling, improve air quality, and provide a smoother ride for motorists. The work is part of Caltrans’ effort to provide motorists with a seamless carpool lane network in California.
Work began in August 2010 and is on track for completion in late 2013. Caltrans thanks motorists for their patience and understanding during construction.
For more information, visit www.I-5info.com .
Caltrans Closes Lanes Of I-5 To Construct High Occupancy Vehicle Lanes
Article: Caltrans Closes Lanes Of I-5 To Construct High Occupancy Vehicle Lanes 
Source: Santa Clarita News
Author: Newsroom