Mary Avenue Overcrossing

Update:

The city council selected Alt 3 (HOV/transit + bike + ped) on April 20th. The Sunnyvale city staff will now investigate the impacts of all 5 alternatives. In late 2022, the report will be finished and the city council will select which alternative will be constructed.

Map of conceptual alignment of the Mary Avenue Overcrossing

What is the Mary Avenue Overcrossing?

The city is considering a project to build a new bridge over highways 101 and 237 connecting the north end of Mary Avenue into Moffett Park. There are five alternative concepts for the project. On April 20, 2021, the City Council will be selecting one alternative as the “project alternative” and kicking off the Environmental Impact Review process.

Map of conceptual alignment of the Mary Avenue Overcrossing

What is the Mary Avenue Overcrossing?

The city is considering a project to build a new bridge over highways 101 and 237 connecting the north end of Mary Avenue into Moffett Park. There are five alternative concepts for the project. On April 20, 2021, the City Council will be selecting one alternative as the “project alternative” and kicking off the Environmental Impact Review process.

What alternatives are being considered?

  1. A four-lane road for motor vehicles + bike + ped

  2. A two-lane road for motor vehicles + bike + ped

  3. A two-lane road for HOV and transit + bike + ped

  4. A bicycle and pedestrian-only bridge + bike + ped

  5. Build nothing

Cross-section of alternative 4

Alternative 4 is the best for Sunnyvale’s future

  • Building more roads for cars (alt. 1 and 2) will encourage more people to drive, resulting in more congestion in Sunnyvale in the long run (This is a well-documented phenomenon known as "Induced Demand", and it is the reason why building more roadway capacity makes traffic worse).

  • Alternative 3 is okay: We support transit, but we are concerned that HOV lanes are difficult to enforce. We don't want lots of single-occupancy vehicles driving over this bridge, which would make congestion on Mary Ave worse. This is the second-best alternative.

  • A bicycle/pedestrian-only bridge is best. It would provide a stress-free space away from vehicles for bikers and pedestrians to travel and it would not increase congestion on Mary Ave. The bridge would also be narrower and cheaper, which would make it easier for the architects to make this bridge into a Sunnyvale icon, similar to Cupertino's Don Burnett Bicycle-Pedestrian Bridge.

How you can help: send an email

Write an email to City Council (council@sunnyvale.ca.gov). Ideas to include:

  • Describe your own experiences as a bicyclist, pedestrian, or driver on Mary Avenue.

  • In the long run, building new lanes for cars doesn’t reduce traffic congestion, it just encourages more people to drive for more trips.

  • A car bridge would increase traffic on Mary Avenue and connecting streets. Elaborate on how more traffic on Mary Avenue would negatively affect you. For example: danger to you as a cyclist or pedestrian, trips taking longer due to congestion, or noise and air pollution.

  • From 2014 to 2018, 20 cyclists and 40 pedestrians were killed or severely injured by car collisions in Sunnyvale. This is unacceptable. We must improve the safety of our streets for all users.

  • Sunnyvale has a goal that 10% of all trips will be done on foot or by bicycle by 2030, and we won’t achieve that goal with a bridge that enables more driving.


Therefore, I urge you to select Alternative 4 for the Mary Avenue Overcrossing.

This effort is lead by the Bike Sunnyvale Team. Join us. We love new members!