GB-London: T1205 Relationship between train horn test measurements and perceived sound levels on the track

NOTE: This notice was updated on 26 March 2020 for the following reason: Addendum - Guidance Notes to Tenderers - Relationship between train horn test measurements and perceived sound levels on the track (T1205)) Due to the escalating COVID-19 (Coronavirus) situation, RSSB has extended the submission deadline for 'Relationship between train horn test measurements and perceived sound levels on the track' (T1205-02) by one week, to provide more time for tenderers. Tenderers are now asked to explicitly outline the app...