Is it permissible to combine the Dhuhr and Asr prayers while traveling to a city 40 km away if the Asr prayer call (adhan) is made en route?

It is not legislated for you to combine or shorten prayers during your travel to the aforementioned city, because the mentioned distance (70 km) is not considered a distance for shortening prayers. The travel distance at which it is legislated to shorten and combine prayers is not less than eighty-three kilometers.