HD Eurostar and M20 meet on High Speed 1 Kent - Rail vs Road noise! HD

Eurostar doing 160mph-ish? How noisey is the not too busy road on a sunday? Road provides a continuious drone day and night. More modern high speed trains are even quieter than the now ageing eurostars due to advances in aerodynamic technology. How long is the train audible for, 10 secs? Also how small is the physical footprint of the new line on the envirnoment compared to a road, where is the future? Where is the rest of the world investing their transport future in? HS2 protestors take note!