The City of Ontario, in partnership with the San Bernardino Associated Governments (SANBAG), and Union Pacific Railroad, will begin two grade separation projects, the South Milliken Avenue Grade Separation Project and the North Vineyard Avenue Grade Separation Project.
South Milliken Avenue Grade Separation
The South Milliken Avenue Grade Separation will provide for a street bridge over the Union Pacific Railroad Los Angeles Subdivision Line. Milliken Avenue and Mission Blvd. will be elevated approximately 30 feet with all turning movements at the intersection to be made on the bridge. Utilities will be relocated and concrete decorative retaining walls will be used to reinforce the bridge. Philadelphia Street will be re-aligned to the South to reconnect with Milliken Ave. Construction for this project began on Monday, March 3, 2014 and is expected to be completed in the Spring of 2017.
How Will the South Milliken Avenue Project Affect Traffic
Mission Blvd. will remain open during the duration of the construction on the project but will be reduced down to one lane in each direction during different construction phases. Milliken Ave will be reduced to one lane in each direction for the first year of construction to allow for utility relocation. After the first year, Milliken Ave will be closed for 18 – 24 months to allow for the bridges and retaining walls to be constructed. When this happens the turning movements onto Milliken from Mission will be restricted.
North Vineyard Avenue Grade Separation
The North Vineyard Avenue Grade Separation Project will allow for a railroad bridge over Vineyard Avenue. The railroad tracks will be raised approximately seven feet while Vineyard Avenue will be lowered approximately 22 feet. Airport Drive and Holt Boulevard will be re-aligned to meet the change in slope. Construction for this project began on Monday, February 24, 2014 and is expected to be completed in the middle of 2016.
How Will the North Vineyard Avenue Project Affect Traffic
Vineyard Ave will close completely at the railroad tracks on Tuesday, March 4th and will remain closed for approximately two years during construction. Airport Drive will be reduced to one lane in each direction, approximately half a mile in each direction from Vineyard Ave. During the duration of the project, Airport Drive will shift to the south but it will always remain open with one lane in each direction.