Alternative Safety Measure (ASM)
A safety system or procedure provided by the appropriate traffic control authority which, after individual review and analysis, is determined by the Federal Railroad Administration (FRA) tbe an effective substitute for the locomotive horn at specific highway-rail grade crossings. ASMs include:
- Modified Supplementary Safety Measures (SSMs)
- Engineering Alternative Safety Measures (ASMs)
- Non-engineering Alternative Safety Measures (ASMs) include the following:
- Programmed law enforcement
- Programmed public education and awareness
- Photenforcement
Source: Federal Railroad Administration
