As we continue to open new light rail service through the region, you may notice some occasional sounds that were not part of your community before. These sounds all serve a purpose, and ensure that riders, pedestrians, and other members of the community immediately around new stations stay informed and safe around transit.
Can I expect to hear any noise from the station?
Yes. Especially as new stations open, there will be alarm testing, bells, and miscellaneous noises, then there will be a low level of noise whenever trains pass through the station. This noise is below regulatory limits, but it occur regularly, so we want to let you know what to expect.
Types of possible station noise:
Passenger information system testing
There will be some audio testing before the station first opens, when the systems are being installed. Once they’re installed, the system will make announcements frequently during operating hours.
Emergency and fire life safety testing
- All emergency messaging and audio is required to be tested annually.
- Sound Transit tests speakers, horns, strobes, and visual message boards annually to ensure that they’re working. Residents might hear the alarm bells between 1 a.m. and 4 a.m., and they should not last more than 15-20 minutes.
ORCA ticket vending machines (TVMs)
- Sometimes the ticketing booths make sounds when customers interact with them.
- Learn more about ticket vending machines here.
Train bells
Trains bell in the following situations during operating hours:
- Someone is trespassing into the train’s right of way.
- Our track intrusion detection system also will alert if a rider steps into the tracks. An audio message will play to alert the rider to move off of the tracks.
- Trains reach a crossing.
- Trains leave and enter stations.
- Passengers are holding up the train.
Rail grinding
Rail grinding is a routine preventative maintenance tactic that prolongs the lifespan of light rail tracks. This work generally occurs every 2-3 years, and it takes about a night to grind a half-mile of track. As crews work each night, the rail grinding will move further along the selected alignment. Nearby residents and businesses should expect to hear increased noise and see localized sparks near the equipment.