It was possible to operate services at regular 15 minute intervals.
The crossing takes about 20 minutes and the services operate at half-hourly intervals.
Today, a network of eleven bus lines operates at regular intervals within the city.
A network of four bus lines operates at regular intervals within the city.
Services operate outside the city limits during the day at least at 20-minute intervals.
Together the two lines operate at 15-minute intervals through Raunheim.
Instead, the traditional system is a timed flush that operates automatically at regular intervals.
Trains operate at intervals of 1.5 to 15 minutes depending on the line and time of day.
In order to operate services at 15-minute intervals, some trains would consist of six cars, others three.
It is planned to introduce services operating at half-hourly intervals.
