Sound Transit this has begun installing wireless routers on its 58 Sounder train coaches, improving Wi-Fi coverage for thousands of weekday riders who use Sounder to commute to Seattle from as far south as Lakewood and as far north as Everett.

When the upgrade is complete at the end of this month, passengers will be able to board any car on a Sounder train and access Wi-Fi coverage. The additional routers will also allow for faster download speeds, since data will travel along a greater number of Wi-Fi connections.

Sound Transit began offering Wi-Fi on Sounder in 2009. Technology and funding available at the time restricted installation of modems to 18 cab cars. Passengers wishing to connect to the internet needed to be in a cab car to obtain a cell signal, which was often spotty due to the limited number of modems in multiple-car trains.

Wi-Fi access will still be limited by service provider coverage range. High cliffs along the north line Sounder route will continue to block internet and cell phone connections, for example, and some areas along the south line may still occasionally experience spotty service.

– Sound Transit