The Lahti-Hämeenlinna traffic is the traffic procured jointly by the cities. You can pay for the Waltti travel card with a value or season ticket, mobile ticket, contactless payment or cash. Between Hollola and Lahti, ticket prices are the same as LSL's routes. Shifts are run with line codes 802 and 890.
The Hollola-Matkakeskus timetables are compiled in a table that you can download from here (Pdf).
Routes and timetables of lines 802 and 890 can be found in Hämeenlinna's route guide hameenlinna.digitransit.fi.
More information about Lahti-Hämeenlinna traffic on the page Lahti-Hämeenlinna regional transport.
On line 4, frequent intervals
Line 4 runs frequently from Hollola to Lahti. Shifts run to Lahti every 10 minutes during rush hours and every 15 minutes during quieter times. Line 4H leaves from Tiilijärvi and 4V leaves from Tiilikanga. Both drive on Salpakakkai via Terveysti. 4H drives through Hedelmätarha. The route of both lines runs through the central hospital to Lahti's market square, from where the trains continue through Ahtiala to Viuha and Hiekkanumme.
Night service on line 4Y
At night and early in the morning, line 4Y runs from Tiilikanga, through Tiilijärvi, Salpakakkana and Hedelmätarha to Lahti's Kauppatori.
Switching to another line
Line 4 does not go to the travel center, but you can change to any line going to the travel center with the same ticket, if there is still time left on it. You can find more information about exchanging with different ticket products on the page Exchange right.
Lahti's market square is a good place to change, as it has an update stop for all the lines that run through the market. Market square from the C stop all lines go to the travel center. Other exchange places are, for example, the market square E-stop, Mytäjäinen or Central Hospital.
Hollola-Lahti lines on the map
Map larger from here