balise

1. (European Train Control System) An electronic beacon or transponder placed between the rails of a railway.Examples: "Akers claims that ETCS signalling renewals are roughly 50% of the cost of conventional renewals. If nothing else, this is an important reason for NR to be keen to switch. "There's no rocket science or magic in that, there's just physically less to deliver," he says. "There are no trackside signals. Yes, you have balises and marker boards, and you still have train detection, but by and large there is simply less to deliver."