Changes

Take the bus #18 (close to the Viru Gate entrance to the Old Town, where the McDonalds is) to the final stop, about a 30 minute ride. There's a large road to the south and traffic is going fairly slow. One stop earlier you also find a petrol station. Also bus #10 and 14 stop nearby, at their end stations.

It may be possible to hitch from the ferry terminals. When arriving at the port from Helsinki on Viking Line or Eckerö Line, just walk to the Logi street, some 200 m away from the passenger terminal towards the city and stick out your thumb. Many trucks can take you all the way to the Polish border. There is probably a similar place for truckscoming with Tallink's ship, as well.