It takes half a day to get the details over with a judge and decide exactly whose and what accounts to lock, those truckers were allowed to stay there for months. (And if you don't know what exactly to block, you shouldn't be allowed to block anything. Maybe you still have enough reason to look at their movement, maybe not.)

Also, it takes a couple of hours to get the police to unblock a road. Last time I checked, money movement in bank accounts does not block roads.