I suppose studies, EIRs ,political bickering, etc. have a lot to do with this...
http://www.citylab.com/commute/2016/02/10-amazing-things-that-took-less-time-than-the-dc-streetcar/470847/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+TheAtlanticCities+%28CityLab%29
http://www.citylab.com/commute/2016/02/10-amazing-things-that-took-less-time-than-the-dc-streetcar/470847/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+TheAtlanticCities+%28CityLab%29
