I live in Lakewood, Colorado, between RTD light rail W and G lines. This Saturday I go G line. Come back from W line. I biked South Platte trail through Denver. It is free to ride RTD now. They do not call it free. They call it fare collection suspension. They are so empty. I think it is save to ride. 

https://www.youtube.com/watch?v=Y2MwKIBrFS8&t=428s 

I saw pelicans and a turkey. Cant wait for N line to open so that I can bike farther. N line has been delayed 2 years. Since we have the Corona virus now, they have no hurry to open it at all. 

https://www.youtube.com/watch?v=Y2MwKIBrFS8&t=428s