A performance analysis in the mountains and tunnels of AT-PASS (Access Train -Portable Access Signal alarm System) of GPS type

GPS방식의 열차접근경보기의 지형에 따른 영향 분석

AT-PASS(Access Train-Portable Access Signal alarm System) which is used at railroad sideway has an important effect upon geography. Especially, it is used at railroad which is a particular condition, tunnel, curve sections and electric car line sections. Therefore, this paper investigated an affection though field test of railroad which is a particular condition.