Axle counting system BO23-MTA is designed with as little indoor and outdoor equipment as possible. That is why it is commonly used in urban transit beside its core application – on a regular railway track. By using regular and special wheel sensor units, BO23-MTA can be used for train detection in all sorts of environments like tramway, metro, APM (automatic people mover), monorail and regular railway. Specific applications it is used for are: