LAKEWOOD, Wash. -- For two consecutive nights starting April 12, northbound and southbound Interstate 5 will be reduced to a single lane, and that one lane will be redirected through the Berkeley Street interchange.

Contractor crews building a new Berkeley Street overpass as part of the I-5 Steilacoom-DuPont Road to Thorne Lane Corridor Improvements project will close lanes and ramps on northbound and southbound I-5 to set bridge girders April 12-14.

Additional overnight lane and ramp closures are also scheduled April 9-14:

April 9
• Berkeley Street on-ramp to northbound I-5 will close from 8:30 p.m. to 4:30 a.m. April 10.
• Southbound I-5 exit to 41st Division Drive and the 41st Division Drive on-ramp to southbound I-5 will close from 9:30 p.m. to 4:30 a.m. April 10.

April 10
• Northbound I-5 exit to Berkeley Street will close from 8:30 p.m. to 4:30 a.m. April 11.
• Berkeley Street on-ramp to southbound I-5 will close from 9:30 p.m. to 4:30 a.m. April 11.

April 11
• Northbound I-5 exit to Berkeley Street will close from 9:30 p.m. to 4:30 a.m. April 12.
• Berkeley Street on-ramp to southbound I-5 will close from 10 p.m. to 4:30 a.m. April 12.
• Thorne Lane on-ramp to southbound I-5 will close from 10 p.m. to 4:30 a.m. April 12.

April 12
• All lanes of northbound and southbound I-5 will be reduced to a single lane and that one single lane will be redirected through the I-5/Berkeley Street interchange from 10:30 p.m. to 5:30 a.m. April 13.
• Thorne Lane on-ramp to southbound I-5 will close from 10:30 p.m. to 6:30 a.m. April 13.

April 13
• All lanes of northbound and southbound I-5 will be reduced to a single lane and that one single lane will be redirected through the I-5/Berkeley Street interchange from 10:30 p.m. to 6:30 a.m. April 14.
• Thorne Lane on-ramp to southbound I-5 will close from 10:30 p.m. to 8:30 a.m. April 14.

Once the new overpass is complete, it will span all lanes of I-5 and the adjacent rail line, elevating traffic over trains.

For more information on the project, visit www.wsdot.wa.gov/Projects/I5/steilacoomdupontrdtothornelnimprove/default.htm