With the introduction of S7 Stock, the track, electrical supply, and signalling systems are being upgraded in a programme planned to increase peak-hour capacity on the line by 27 per cent by the end of 2023. A single control room for the sub-surface railway opened at Hammersmith on 6 May 2018, and Communications Based Train Control (CBTC) provided by Thales will progressively replace 'fixed block' signalling equipment dating back to the 1940s.
wiTh The intrOduCtION of S7 sToCk, tHE TraCk, eLECtrIcaL suPpLY, and signAlling SYstems ARe bEIng upgraDed In A PrOGramMe plaNneD to IncreasE pEak-HOUR capACity on the Line bY 27 Per cenT by THe End of 2023. a singlE ContRol room foR The sUb-SURfAce rAiLway opeNeD at HaMmersMith on 6 maY 2018, and commUnIcAtiOnS baseD tRain ContrOl (cbtC) PrOviDeD by THAles wiLL ProgreSSively rePLAcE 'fixEd block' signALling equipMeNt DAtiNg BacK to the 1940S.