It's a combination of things. For one, the rail goes down once very busy streets causing less lanes and causing familiar turns to no longer be allowed. Old habits die hard. For another, some of the rail conductors have not stopped long enough when they should have, some pedestrians try to cross streets not used to rail, Some turn lanes are on the tracks and not marked off right, etc. It's a new thing with lots of kinks to work out. Personally I am for expanding transportation but don't understand why they don't have Els because of traffic, low lying areas that are frequently flooded, etc. I think lots of mistakes were made in the engineering phase, at least that is the opinion of an engineer i know.
Houston is well known as a large metropolitan area with inefficient public tranportation. Meaning that if you want to go to one area of town from an area 5 miles away, you may have to go downtown first and make one or more additional transfers. I went for the medical center area to Bunker Hill area, not a huge distance here, maybe with good traffic, 15 minutes by car.. It took me 3 1/2 hrs each way and NOT in rush hr traffic. In Houston, your car is like your horse in the old west. If you don't have one, you just don't get very far from many places.