Vancouver costs

https://thetyee.ca/Opinion/2017/10/30/I-Left-Vancouver/

Streetcar_vs_Light_rail

https://en.wikipedia.org/wiki/Minneapolis_Streetcar_System#Streetcar_vs_Light_rail

broadway subway

https://thetyee.ca/News/2017/10/16/Underground-Spaces-Broadway-Subway/

http://www.cbc.ca/news/canada/british-columbia/ubc-tunnel-subway-transit-bc-mauro-chiesa-1.4050842

http://www.cbc.ca/news/canada/british-columbia/broadway-subway-stations-future-stations-public-consultations-1.4177624

Tahoe Reno Industrial Center

https://en.wikipedia.org/wiki/Tahoe_Reno_Industrial_Center

derinkuyu underground city

http://mymodernmet.com/derinkuyu-underground-city/

Singapore transport

http://www.straitstimes.com/singapore/transport/downtown-line-3-officially-opened-khaw-announces-plans-to-make-transfers-between

http://www.straitstimes.com/singapore/transport

oakridge-centre-redevelopment-redesign-october

http://dailyhive.com/vancouver/oakridge-centre-redevelopment-redesign-october-2017

http://dailyhive.com/vancouver/vancouver-oakridge-municipal-town-centre