Nevertheless, Barthelemy contends that if local factors posed the most powerful influence on the shape of subway networks, then the team wouldn't have discovered these universal rules. (scientificamerican.com)
«New York is doing well because of its comprehensive subway network that operates 24 hours and the fact that trains go to Long Island and New Jersey,» said Jasper de Lange, transportation project manager at Arcadis. (nypost.com)
Barthelemy says his team does not know which factors are guiding subway networks to follow these general rules; perhaps the rules maximize efficiency. (scientificamerican.com)