Prayer: In European cities that are directly connected, how is the tarakhkhuṣ (travel threshold) limit determined?

Practical Laws of Islam as per the teachings of Imam Khamenei

Prayer: In European cities that are directly connected, how is the tarakhkhuṣ (travel threshold) limit determined?

English:

Question #673:

In Germany and some other European countries, the distance between some cities (that is, the distance between the exit sign board of one city and the entry sign board of the other) is not even a hundred meters, and the houses and streets of the two cities are totally connected to one another. What is the tarakhkhuṣ limit in such cases?

Answer #673:

Assuming that two cities are connected to each other so that people consider them as one single city, the rule of such cities is similar to that of two localities of one city. Thus, leaving one for the other is not regarded as traveling and there is no need to consider the tarakhkhuṣ limit.

-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Prayer