Railway applications - External visible and audible warning devices - Part 4: Audible warning devices for urban rail
This document defines the functional and technical requirements for exterior audible warning devices for urban rail vehicles as defined in the CEN-CENELEC Guide 26, i.e. metro systems, trams, light rail, and local rail systems.
This document also defines the requirements for testing and conformity assessment.
NOTE The requirements for exterior audible warning devices for heavy rail vehicles are found in EN 15153 2:2020.