**5.1 Backup Traffic Management Service (BTMS)**

Security in railway industry is a critical issue. Intelligent Transportation Systems are becoming a very valuable way to fulfill these critical security requirements. In fact, today, rail traffic management is performed automatically using Centralized Traffic Control systems (CTC) (Ambegoda et al., 2008). These systems are based on sensors and different elements fixed on the tracks. They allow real-time traffic management: (a) location of trains, (b) states of the signals, (c) status of level crossings and (d) orientation of the needles. Most of the infrastructure management entities have a CTC that handles centralized all these issues. The applications and systems that handle these tasks are very robust and have a performance index near 100%. Problems occur when these systems fail. In those situations, traffic management has to be performed manually and through voice communications between traffic operators and railway drivers (Sciutto et al., 2007).

In this section web described a support system to assist traffic operators in emergency situations in which CTC systems fail. The main objective of this system is to reduce human error caused by the situations in which priority systems do not work properly.
