"The testing is going well and we will need further permission from the FRA and (Colorado Public Utilities Commission) to test the wireless-crossing technology at a later date"

So it comes out. The wireless technology has been the problem this whole time, now they are bailing on using it - and they have to complete the testing with the physical technology. Too bad they spent more than 1 year hoping the wireless would have been fixed. Bit off more than they could chew, IMO.