Rub-rails
Protect tire-sidewalls from the sharp metal edge of the I-beams. You can extend these
in the various ways.

Hand-rails
Though considered optional, bridges that are accessible to public traffic should install handrails for legal protection purposes. From simple metal structure, to varnished wood with metal scroll, this can give any bridge simple pedestrian safety with a unique flair.

Catwalks
Furthering pedestrian safety, catwalks allow a bridge pedestrian travel
without impeding the flow of vehicular traffic.

Decking
Road surface decking comes in a variety of thickness, 1/4", 5/16", or 3/8", and can be flat or diamond plate. Diamond plate can add grip except in areas of frost or snow where the decrease in tire to bridge surface contact can adversely affect traction. We can also add texture by tarring followed by a layer of sand / gravel.