 The speed limit will be reduced to 45 miles per hour at night. Changes could be coming to the Boise River Greenbelt as Ada County is proposing a 10 mile per hour speed limit on the popular local bike trail and pathway. The Ada County Board of Commissioners was supposed to meet Tuesday morning, but after hearing so much public interest on the topic, they decided to postpone the meeting until August 13th. The Idaho Press reports Greenbelt users are divided on the issue.