From OpenStreetMap Wiki
|barrier = handrail|
|A rail designed to be grasped by the hand so as to provide stability or support.|
|Used on these elements|
|Tools for this tag|
barrier=handrail - a rail that is designed to be grasped by the hand so as to provide stability or support. Usually found alongside steps.
How to map
Draw a way along the handrail location and add tag barrier=handrail.