I believe the main problem with Alabama Street is speed. People drive too darn fast. Lack of attention on the part of drivers, riders and pedestrians is the second problem. The third problem is dark clothing. I have seen many pedestrians dart across Alabama and expect drivers to stop, no matter where they are in the road. This is especially bad after dark. To compound their negligence, wearing black clothing makes them barely visible. Some bike riders drive without lights and wear dark clothing, too.
Perhaps more policing is needed. We asked for a police presence at Texas and Michigan streets before the roundabout was installed. Cars still blow through stop signs crossing Texas Street. I guess the thinking is there is a round about, so another driver can't hit me.
Traffic is already heavy on Alabama. Cutting the street down to one lane is not the answer. It will only compound the problem. I agree bike riders should be able to share the road. However, they also need to follow the rules of the road and ride responsively. I watch out for them because they can be unpredictable. Reminds me of a famous quote "can't we all just get along?"