 The tunnel will minimise blight for residents and businesses and eliminate the substantial impact of traffic which a surface route would otherwise have caused.The further bore tunnelling will link up the tunnels already planned beneath South Ruislip and Ruislip Gardens and Old Oak Common to North Acton.HS2 Ltd found in a study they had undertaken that bored tunnelling this specific stretch of the HS2 route will take 15 months less time than constructing a surface HS2 route through this area.