A plan to add bicycle lanes and further limit on-street parking on Oak and Hickory streets through central Denton is headed to a city commission for review Monday. The plan is designed to offer safe bike paths from the University of North Texas to the planned bus and commuter rail station east of the downtown Square, city officials say. But the potential loss of on-street parking in front of some homes and businesses — along with an alternative proposal to widen parts of Oak and Hickory to make room for bicycles and cars — has some residents worried.