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A Controller of Site safety or COSS is anyone capable via the Network Rail to make certain safe exercise for work occurring on or close to railway tracks and infrastructure. Their Major part is usually to build a safe program of work to protect staff from trains and mechanised vehicles.

The popular Protected techniques of Operating exactly where the staff are shielded from line open to coach actions, either by blocking some or all lines to visitors or controlling the gap the team is through the track (termed Safeguarded/Fenced/Separated areas as a way of consideration). This process was previously referred to as a Environmentally friendly Zone. This is actually the most secure method of Doing the job on account of the upper hazards with trains going at speed, Whilst several incidents continue to occur within just blocks.

Open up Line Operating (formerly often called Purple Zone) usually means the traces are open up to teach movements; This is certainly found as much more risky than Safeguarded/Fenced/Separated places, and is also averted from the rail field where practicable.

The COSS is liable for the safety tfl assistant project manager of the complete group and is subject to prosecution ought to somebody be killed or injured by their carelessness.

To become a COSS, a person should have served an acceptable length of time over the railways and undertake a 5-day course. This can be then followed by a duration of mentoring by a highly skilled COSS after which you can impartial normal assessments to make sure that the topic is proficient to undertake their part properly and proficiently.

The principles around accomplishing the position of the COSS are stated from the Rule Book [1] a set of files issued to track personnel detailing their obligations.

A COSS is distinguishable on internet site by wearing a blue armlet about the left arm or higher physique on which the phrase "COSS" is printed in white textual content.

Beforehand, the COSS was generally known as the individual In Charge Of Operate/Possession, or PICOW/PICOP.