Complex sentence: At the same time, the region is currently putting in place "Alséo", a magnetic card allowing access to the urban transport networks of Strasbourg, Colmar and Mulhouse, but also the TER network.
Split into simpler sentences: At the same time, the region is currently putting in place! Alséo!, a magnetic card allowing access to the urban transport networks of Strasbourg, Colmar and Mulhouse, but also the TER network.