Congestion Relief

State Route 99/120 Connector – San Joaquin Council of
Governments

For the first time since it was created in 1968, the San Joaquin Council of Governments is leading a 
construction project. The State Route 99/120 Connector is vital to moving goods and people 
throughout the region. The improvements, partially paid for by Measure K, will make traffic flow 
more efficiently and safely, reduce congestion and greenhouse gas emissions, which will improve air 
quality. This first phase includes building a new road between Austin Road and East Atherton Drive. 
The Austin Road overcrossing will be removed and later replaced. East Woodward Avenue will be 
made four lanes and new railroad gates built. Work will be done to widen the State Route 120 ramp 
and State Route 99. Teichert Construction was awarded a $48.2 million contract in June for the 
first phase.

State Route 99/Turner Road Interchange – Lodi

The improvements to the State Route 99/Turner Road Interchange in Lodi enhanced safety and
connectivity for pedestrians, cyclists and motorists, redirected traffic away from a school and residential
neighborhood, improved traffic flow on and off State Route 99, and beautified one of Lodi's gateways.
Improvements included the construction of a round-a-bout near the southern end of the southbound     
Turner Road freeway off-ramp, widening of Cherokee Lane from one-way southbound to a two-way     
road between Pioneer Drive and Turner Road. Included were bike lanes in both directions and a    
sidewalk on the western side of the road. The project also included lengthening the SR99/Turner Road   
southbound on-ramp by 400 feet to provide longer acceleration distance to merge with mainline traffic.  
The project was completed and open to traffic in Fiscal Year 2023-24.

State Route 120/McKinley Avenue – Manteca

The ribbon cutting for the State Route 120 and McKinley Avenue interchange, which was partially
paid for by Measure K, was in June 2024. The transportation infrastructure project features new 
ramp bridges, auxiliary lanes, ramp metering, and improvements to McKinley Avenue, including 
sidewalks and bike lanes. The project will service Manteca’s Entertainment District and anticipated 
growth in the area.

State Route 120/Main Street Project Study Report and State
Route 120/Airport Way Project Study Report – Manteca

Measure K is helping to pay for studies by Manteca and Caltrans for future improvements to two
interchanges – State Route 120 and Main Street and State Route 120 and Airport Way. The 
projects would improve local and regional traffic circulation and reduce congestion, which would
improve traffic operations and mobility to accommodate future traffic demands. Bicycle and 
pedestrian improvements would be included for the interchanges. The city is recommending that
diverging diamond interchanges be used at each location to reduce the footprint and cost of the  
projects.

SR 120/Main Street ProjectSR 120/Airport Way Project

Louise Avenue Pavement Improvement Project – Manteca

Measure K funds were used in Fiscal Year 2023-24 to help Manteca rehabilitate deteriorated pavement on
Louise Avenue from Main Street to State Route 99. The project includes removing 
existing asphalt where needed, installing new asphalt, updating the striping and pavement 
markings, installation of bike lanes, and Americans with Disabilities Act curb ramp
improvements. The improvements will enhance safety for pedestrians, cyclists and motorists. 
Work began in June 2024 and continued into October 2024.

I-580 and International Parkway/Patterson Pass Road – Tracy

Measure K funds are contributing toward design and construction of a diverging diamond interchange 
at Interstate 580 and International Parkway/Patterson Pass Road in a project by Tracy and Caltrans. 
This project will ease traffic congestion projected by commercial and residential growth in the area. 
Relieving traffic congestion will shorten travel times, reduce greenhouse gas emissions and improve 
air quality. This will be one of the first diverging diamond interchanges in the state. The first was at 
State Route 120 and Union Road in Manteca. The innovative design reduces traffic congestion,   
improves safety for pedestrians, cyclists and motorists, is less expensive to build than a traditional  
highway interchange, and has a smaller footprint. It also requires traffic on the overpass to drive      
briefly on the opposite side of the road from what is normal.

Before
After