Topic summary
Transilien Line H
Extracted from the Wikipedia article Transilien Paris-Nord.
Services
The second, third and fourth letters indicate the stations served by the train. A Transilien Line H train calling all stations has an O as the second or the third letter (AOLA, OPOC, POVA, SOGA). An E on the second position indicates that a radial service does not serve nearly all stations on the route (LEMI, LEVI). If the train runs via Montsoult–Maffliers then the third letter is always an M (LOMI, POMA).