Driving from Riga take the A9 and follow signs for "Osta". You'll reach an intersection where you can see a sign that says “Brivosta”, turn right here and stay on the main road. Then travel on this road until you cross the railway tracks and then take a left turn where you will arrive at the Stena Line Liepaja Ferry Terminal.
If you happen to be travelling from Klaipeda, drive on Zirnu Street until you cross the railway bridge, then take a left turn and cross two road junctions. Just before you reach the 3rd junction, take the outside lane of the carriage way and turn right. Then you can take a left turn left onto Raina Street and drive until you reach an intersection with signs showing a pictogram of "Pramis" (Ferry). Here you need to turn left and after crossing the railway tracks, turn left again to reach the Stena Line Liepaja Ferry Terminal.