MPAB-U – a system of train separation and assurance of train operation safety at single-track and multiple-track low-density railway spans with any traction type using a function of semiautomatic blocking.

Span occupancy/vacancy is monitored using the axle counting equipment.

Main functions of MPAB-U

• monitoring occupancy/vacancy of each track of a span;
• monitoring integrity of an arrived train automatically;
• exchanging information between adjacent stations to implement an algorithm of semiautomatic blocking;
• shaping signals for EC;
• coding track circuits of station approaching sections with signals of ALS.

System advantages

• minimum quantity of station equipment when integrating into MPC-U;
• software implementation of logical dependencies in a safe central processor;
• possibility to arrange an automatic blockhouse at a span;
• availability of interfaces for coupling with any type of EC.