Research for the project drew on pressure data from HS1, the high-speed line between London and the Channel Tunnel, where no such sonic boom effect has been observed. Using HS1 as a reference point, ...

In order to decide how long each extension needed to be for every HS2 tunnel, the team used micro-pressure wave measurements from Britain’s first high speed line between London and the Channel Tunnel, ...

However, he was quickly snapped up to become an advisor for the rail regulator, Network Rail’s property team, HS1, Heathrow Terminal 5, and franchise bids. Pettitt was honoured by having the ...