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A Controller of Site safety or COSS is a person experienced through the Network Rail to make sure Protected follow for work occurring on or near railway tracks and infrastructure. Their Key role is to build a safe technique of work to protect workers from trains and mechanised vehicles.

The preferred safe systems of Functioning where the team are protected against line open up to teach actions, both by blocking some or all lines to workers or managing the distance the team is with the monitor (known as Safeguarded/Fenced/Divided regions so as of thing to consider). This process was previously named a Environmentally friendly Zone. This can be the safest strategy for Doing work on account of the upper hazards with trains moving at pace, Whilst lots of incidents even now happen in blocks.

Open up Line Functioning (formerly known as Red Zone) signifies the strains are open up to teach movements; This is certainly seen as far more dangerous than Safeguarded/Fenced/Divided spots, and is avoided inside the rail sector wherever practicable.

The COSS is accountable for the safety of the whole group and is topic to prosecution ought to a person be killed or injured by their carelessness.

To become a COSS, a person should have served an acceptable period of time on the railways and undertake a 5-day program. This can be then accompanied by a duration of mentoring by a highly trained COSS then independent frequent assessments in order that the subject is competent to undertake their job safely and securely and efficiently.

The principles around accomplishing the rolling stock jobs position of a COSS are said in the Rule Book [1] a list of documents issued to track team detailing their responsibilities.

A COSS is distinguishable on web page by sporting a blue armlet over the left arm or upper entire body on which the word "COSS" is printed in white text.

Previously, the COSS was referred to as the individual Answerable for Function/Possession, or PICOW/PICOP.