When planning the subway renovations, the engineers wanted to be sure that the design solutions they chose would comply with current safety regulations and ridership. For instance, at Kiyevskaya station, one of the Moscow’s largest metro hubs, with ridership of 30,000 passengers an hour, the engineers decided to enlarge the existing antechamber to increase the passenger flow, replace the escalator belts, and add an extra escalator in the rundown corridor to the Arbat-Pokrovskaya line. To evaluate the project design, they contracted the specialists of the Institute for Development of...