If two of these train sets--all outbound trains of Maizuru, Tanba nos. 1, 3, 5 and 7, and Hashidate nos. 3 and 7--are coupled, the passengers can pass through from one train set to another (passing through cars 4 and 5), but since the trains are decoupled at Ayabe Station the passengers aren't allowed to go through the cars if station arrival is less than 15 minutes away (if the train goes nonstop at Wachi Station, it seems that decoupling is carried out shortly after this station is passed).
下りのまいづる全列車とたんば1.3.5.7号ならびにはしだて3.7号車両編成相互間（4号車と5号車）の通り抜けはできるが、綾部駅での切り離し作業準備のために同駅到着の約15分前（おおよその目安としては、和知駅に停車しない列車の場合、同駅を通過したあたりで行われると思われる）になると、通り抜けはできなくなる。