
I often get questions from Irvine residents about traffic light synchronization. To help answer these questions, I enlisted the help of my appointee to the Irvine Transportation Commission, Ken Montgomery.

Irvine Transportation Commissioner Ken Montgomergy
Ken knows more about these matters than just about anyone. He is a retired civil engineer with more than 40 years of experience in managing public works and traffic and transportation issues. He served as Director of Public Works for three Southern California cities: Norwalk, Redondo Beach, and Laguna Niguel.
Ken retired from the City of Laguna Niguel in 2009 after 18 years as that City’s first Director of Public Works/City Engineer.
Ken has been closely following transportation and traffic issues in Irvine for decades and has served as a member of the Irvine Transportation Commission since it was re-established in May 2017, initially as its Chair.
Here is what Ken has to say about traffic light synchronization in Irvine:
Traffic Light Synchronization in Irvine
Ken Montgomergy
City of Irvine Transportation Commissioner
Overview
The City of Irvine owns and operates over 370 traffic signals.
All of the city’s traffic signals on the major corridors in Irvine are already synchronized.
There are another 40 Traffic signals at freeway on and off ramps that are owned and operated by Caltrans. Those 40 signals are in the process of being upgraded so they can be coordinated with Irvine’s signals on those specific corridors.
What is Traffic Signal Coordination?
Traffic Signal Synchronization is a traffic engineering technique of matching the green light times for a series of intersections to enable the maximum number of vehicles to pass through, thereby reducing stops and delays experienced by motorists.
Synchronizing traffic signals ensures a better flow of traffic and minimizes gas consumption and pollutant emissions.
Driving on a corridor that is synchronized does not means that a driver will get all green lights. Rather, the system attempts to maximize the efficiency of the system favoring the heaviest traffic directions depending on the time of day.
For instance, Jamboree Road traffic is twice as heavy in the southbound direction in the morning compared to morning northbound traffic. The synchronization system sets the timing to favor the southbound direction in the morning. The opposite occurs in the evening peak period when north bound Jamboree traffic is much heavier than the southbound traffic.
Irvine’s Traffic System
The City operates 19 synchronized traffic signal systems that are currently not coordinated with the Caltrans signals. Within the next 12-18 months, the Caltrans signals will be coordinated with the City’s synchronization program, which will considerably help traffic flow on those corridors.
These 19 synchronized traffic signal systems crisscross each other, which means that two heavy traffic corridors are competing for the same green light time. Also, heavy left turn demand at intersections limits the amount of green light time available for through traffic. In addition, timing plans for these corridors can get out of date as traffic patterns change all the time. The city is constantly taking new traffic counts and making adjustments to the synchronization plans.

Traffic signal equipment also gets old and obsolete, so the city typically upgrades all the equipment and recalculates the timing plans on three or four corridors per year. These updates also involve adjacent cities so the synchronization program can operate across city lines. For example, we currently have two synchronization projects underway with the City of Tustin.
The City of Irvine has a traffic signal control center at City Hall, called the Irvine Traffic Research and Control Center (ITRAC) that monitors those 19 synchronized corridors with video detection. ITRAC is staffed by traffic engineers from 6:00 a.m. to 8:00 p.m. When there is a construction project or a utility repair or a traffic accident that takes out a lane, staff modifies the signal timing to prevent a major back up in the direction where the constriction is taking place. Only Irvine and Anaheim have this type of traffic signal management center in Orange County.
There are three periods during the day when these 19 corridors are synchronized, the AM peak period, the mid-day peak period and the PM peak period. The hours of operation of those three periods varies from corridor to corridor. Corridors are typically not synchronized on weekend days except when there is a special event. When a corridor is not is the synchronized mode, traffic signals operate independently within certain pre-programmed parameters. Traffic signals detect the presence of vehicles and bicycles all around the intersection and allocate the green light time as necessary.
Reporting a Problem
If you ever observe a traffic signal that you think is not functioning properly, call ITRAC and report it.
Their direct line is 949 724-7324. Just tell them what you observed at a specific traffic signal and they will check it on the monitors and fix the problem if necessary. Traffic signals are complicated systems and require constant observation.
I know we would all love to have green lights all the time, but that is just not reality. If it were, we would implement the “All Green Light Plan” — as would every city.

At one time, it seemed that the Woodbridge Village Center might be demolished.
After 40 years of success, the people of Woodbridge love their community, and they love their Woodbridge Village Center. That’s why people are so upset by the prospect that their Village Center will be destroyed and replaced with high density apartments and condos or office buildings.”

The 
As the
At our last Irvine City Council meeting, the Great Park’s Interim Director, Pete Carmichael, presented us with the latest Great Park Progress Report, which I want to share with you.
Forward Planning Updates:
Of course, there is still more to do. As I have said, while I am proud of all that we’ve recently accomplished at the Great Park, 
Please note, this meeting was rescheduled from a previous date.

Happily, the residents’ concerns were heard

recreational uses and a potential for the expansion of the Organic Circle Farm, helping with annual revenues for the Great Park.


The Great Park should also include a world-class natural history museum.
manufacture. Some of the artifact types recovered from these sites include cogstones, metates and manos, mortars and pestles, shell beads, hammerstones, projectile points, scrapers, incised stone and pottery sherds. Historical artifacts from the last century include glass bottles and toys. The artifacts held by the Cooper Center are the most extensive collection of Orange County history and prehistory anywhere and they provide archaeologists with a comprehensive view of what life was like in Orange County.






Join the 
Arrive at 5:30 p.m. to sign up; on-site lesson starts at 6 p.m. Then, stay for a recreation swim that includes a water slide, giant inflatable slide and diving boards.



PLAY-WELL TEK
I agree.
Movies are weather permitting. Admission is free.
The stress of shelter life is often quite difficult for senior animals and so the quicker they can find a good new home, the better. These animals are often already housebroken, so they make great companions for senior citizens.
“Dear Melissa,
The Irvine Prevention Coalition (IPC) is a coming together of community partners representing more than 92 civic, business, school, faith, parent, school, youth and community based agencies who work together to support children, youth and families in Irvine. The Irvine Prevention Coalition meets regularly to coordinate our school and community based prevention and early intervention efforts. If you live or work in Irvine and would like to get involved in alcohol, tobacco and other drug and violence prevention, we invite you to join by contacting them at info@icdp.org.
Irvine is proud of its military heritage, especially its close connection to the United States Marine Corps.
I spoke about the history of the Orange County Great Park — of which I am the Vice Chair — and its future development.
The discount does not apply to licensing or puppy wellness fees.
Orange County has a long and proud military tradition. Currently, more than two million veterans live in California – more than in any other state. Orange County has over 130,000 veterans — one of the highest populations in the United States – including more than 7,000 veterans of the Iraq and Afghanistan wars.



Irvine has a long and proud military tradition. From 1942 to 1999, Irvine was home to
The Northwood Gratitude and Honor Memorial, dedicated in 2010, is the nation’s first and only memorial dedicated exclusively to listing the names of all the fallen American service members in Afghanistan and Iraq.
As I have done in past years, I will be filling out a memorial card for my cousin, 

YES on Measure B is endorsed by an amazing bi-partisan coalition of political leaders and organizations, veterans organizations, environmentalists, labor union leaders, and editorial pages, including:
I was one of the earliest and strongest advocates for a Veterans Cemetery located at the old El Toro Marine Air Station. I attended and spoke at every Irvine City Council meeting where the Veterans Cemetery was discussed.





The Bommer Canyon Community Park Rehabilitation Project focuses on refreshing the former Cattle Camp, originally built in 1967. The 15-acre rustic site is a popular setting for parties, company picnics, weddings, family reunions and camp-outs.
For Social Service enrollments, please bring driver’s license, social security card, verification of all income, property & citizenship.


One of the best — and most distinctive — things about Irvine is our commitment to preserving open space.
Who are the children we meet every day at Families Forward?
I will be answering questions from the community about the Orange County Great Park — of which I am the Vice Chair — and future development.



We are grateful for the blessings of our beautiful planet and our beautiful state of California.






The topics covered include the new composition of the Irvine City Council, Irvine’s recent progress on environmental issues, traffic, Melissa Fox’s goals for the Great Park, and the Orange County Veterans Cemetery.
I am delighted that Ken Montgomery will be contributing his expertise and insights to fixing Irvine’s traffic problems and building a transportation system that will serve Irvine in the 21st Century.


Turn Up The Volume!
Their message to Irvine’s Sierra Club members stated that “City Council candidate and Community Services Commissioner Melissa Fox is a former Orange County Reserve Park Ranger and a passionate advocate for creating sustainable communities that incorporate public transit, active transportation and access to work, parks, shopping and recreation. Melissa is committed to environmentally responsible, community-oriented planning, including green building practices [and is] dedicated to stopping the rushed development of more housing and office buildings without proper planning or adequate infrastructure, and without consideration of its impact on our schools, our traffic, the character of our communities, and our quality of life. Please vote for the environment in the November election by casting your ballot for Melissa Fox.”

And every candidate for Irvine City Council now promises to control over-development and keep our traffic moving.
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