3 ms·
There's also difference in ventilation design. A lot of the tube relies on the piston effect for ventilation. NYC's subways are underneath major roads and near
by bobthepanda 4y ago
There's also difference in ventilation design. A lot of the tube relies on the piston effect for ventilation.
NYC's subways are underneath major roads and nearly always features extensive sidewalk venting for the entire length, as depicted in the iconic photo of Marilyn Monroe. https://img.atlasobscura.com/EEahxLmWgG-xahr-cXyJ1_TFUKch_pn0COzG6RZMyXM/rt:fit/w:1200/q:81/sm:1/scp:1/ar:1/aHR0cHM6Ly9hdGxh/cy1kZXYuczMuYW1h/em9uYXdzLmNvbS91/cGxvYWRzL3BsYWNl/X2ltYWdlcy8xMDBk/OGYxYjQ4N2Q4ZjY3/ZTdfMTQ1NTE4MzIy/MDRfNzdkOGI5ZjI1/Nl9vLmpwZw.jpg https://img.atlasobscura.com/EEahxLmWgG-xahr-cXyJ1_TFUKch_pn...
- dredmorbius 4y agoWhere "piston effect" is the passage of trains through the tunnels forcing out air (ahead) and drawing it in (behind), correct? AFAIU that's a major component of any subway's ventillation.
- bobthepanda 4y agoYes. The difference is that London relies solely on the piston effect. NYC has the subway vent grates on nearly every block where a subway runs. Modern systems generally also use HVAC.