Under Construction

The Riverside County Transportation Commission (RCTC) is conducting safety and road improvements along a major 8.6-mile segment in the County of Riverside. Major roadway improvements will be made along the Ramona Expressway from Warren Road to about one mile east of Rider Street in the County. This segment is within the Mid County Parkway, also known as the MCP, a planned 16-mile corridor between Route 79 in the Hemet Valley and Interstate 215 in Perris. Construction is set to take place from early 2026 to 2028.

The MCP Ramona Expressway experiences a high rate of vehicular collisions. To address the high priority safety and access needs in the area, RCTC has deferred final design of the MCP Segment #1, west of Ramona Expressway. Roadway improvements along Ramona Expressway will include the following:

• An additional travel lane in each direction (one to two lanes)
• A raised median
• Construction of a new bridge over the San Jacinto River
• Traffic signal upgrades
• Construction of a wildlife crossing

These upgrades are designed to improve motorist safety, reduce travel times, and expand access to jobs, education, and transit. The Ramona Expressway serves as a vital link that provides equitable access to multiple modes of travel with connections to SR-79, I-215, and transit facilities that support Metrolink’s 91/Perris Valley Line and Riverside Transit Agency routes.

During construction, periodic lane closures and traffic shifts are expected. Work may take place during daytime, nighttime, and weekends hours. Motorists should plan for extra travel time. Access to homes and businesses will be maintained where possible. Construction alerts will be posted as updates are made available. To receive alerts via email, sign up using the form below.

The Riverside County Transportation Commission (RCTC), in partnership with the Southern California Regional Rail Authority (Metrolink), Caltrans, and the City of Perris, is expanding the Perris-South Metrolink Station. This station serves as the end point for the 91/Perris Valley Line, north of Ethanac Road.

The project will add a second passenger loading platform at the station, along with canopies and other passenger amenities. To accommodate the new platform, 1,200 feet of new station track will be added to allow two passenger trains to board and deboard at the same time. This new track will also allow the station to remain operational if a train is out of service on one set of tracks.

The project also includes construction of a fourth track at the Perris-South layover maintenance facility. This will include building new track and installing a new switch for trains to change tracks. This will improve Metrolink service operations and efficiency by allowing more trains to be stored overnight.

The Mid County Parkway (MCP) Alignment is a long-term transportation improvement initiative led by the Riverside County Transportation Commission (RCTC) to deliver a planned 16-mile east–west transportation corridor between western San Jacinto and eastern Perris. The program is designed to reduce travel times, improve and update roadway safety components along the entire corridor, and open new economic opportunities by expanding access to employment, education, and regional destinations for residents and businesses in central Riverside County. These improvements promote transportation equity in a long-underserved area while supporting future growth and mobility needs. 

The MCP Program is made up of five projects, each advancing independently based on funding availability, regional priorities, and safety urgencies. 

• I-215 Placentia Avenue Interchange (Opened Fall 2022) and Widening (Opened Spring 2023 by City of Perris) 

• Future MCP Segment – Deferred in favor of the Ramona Expressway Segment 

• MCP Ramona Expressway – Construction will begin in April 2026 

• Future MCP Segment – Connects to SR-79 in San Jacinto 

Together, these projects will implement comprehensive safety improvements across the entire alignment, addressing documented collision history and improving roadway safety for pedestrians, motorists, freight operators, bicyclists, and community members. When complete, the MCP Alignment will connect State Route 79 to Interstate 215 and key transit facilities supporting Metrolink’s 91/Perris Valley Line and Riverside Transit Agency routes, creating a safer, more reliable, and more integrated multimodal transportation network for Perris, San Jacinto, and multiple unincorporated Riverside County communities in the area. 

The Riverside County Transportation Commission (RCTC), in partnership with Caltrans, Western Riverside Council of Governments, and the City of Temecula, has implemented innovative technology along the northbound Interstate 15 (I-15) in Temecula and Murrieta that is anticipated to improve traffic operations and enhance travel time reliability for drivers.

Severe congestion occurs along northbound I-15 from the San Diego/Riverside County Line in Temecula to the I-15/I-215 Interchange in Murrieta. This is caused by the high volume of vehicles entering the freeway at the Temecula Parkway, Rancho California Road, and Winchester Road on-ramps, particularly during peak afternoon and evening hours.

The project includes an eight-mile, non-tolled segment equipped with advanced sensors and intelligent transportation system features that continuously monitor real-time traffic conditions. Recently, the project reached a key milestone with the launch of a 90-day baseline data collection period, during which sensors are gathering information on traffic volumes, speeds, and travel times to establish current conditions.

Once the system turns on, adaptive ramp meters will function as a coordinated system, adjusting in real time to allow more or fewer vehicles to enter the freeway. This approach is designed to improve mainline traffic flow, reduce stop-and-go conditions, and enhance travel time reliability. Digital message signs will also display recommended speeds and current conditions along northbound I-15 to help maintain steady traffic flow and improve safety.

While drivers may initially experience short delays at on ramps, the system is expected to result in overall time savings, fewer stops, and smoother travel along the corridor. The system collects traffic flow data only and does not capture photographs, issue tickets, or collect personal information. The pilot project will begin in June and will be evaluated over a two-year period to determine its effectiveness and potential for broader implementation.