- Stage 2 ION
- Citizens for Cambridge’s extensive FAQs on ION Stage 2
- Transit costs
- Oh the Urbanity – How This Small City Built Light Rail For Cheap (video about ION Stage 1)
- Understanding the Drivers of Transit Construction Costs in Canada: A Comparative Study
- Transit Costs Project: Understanding Transit Infrastructure Costs in American Cities
- Station to Station: Why Subway-building Costs Have Soared in the Toronto Region
- ION stage 1
