Abstract:
USING THE AVERAGE TRANSVERSE POSITIONS OF FREELY MOVING AND MEETING PASSENGER CARS AS AN INDEX, IT IS FOUND THAT AN 18-FT PAVEMENT WITH 3-FT. SHOULDERS REQUIRES A CONCRETE BRIDGE OF FROM 26 TO 28 FT IN WIDTH. THIS REQUIRED WIDTH INCREASES TO 28 OR 30 FT WHEN THE TOTAL ROADWAY WIDTH IS INCREASED TO 34 FT. AND THE PAVEMENT IS EITHER 20 OR 22 FT WIDE. THE GREATEST WIDTH OF BRIDGE REQUIRED FOR A 22-FT PAVEMENT WAS FOUND TO BE 30.6 FT. SIDEWALKS APPARENTLY ADD NOTHING TO THE EFFECTIVE ROADWAY WIDTH ON SHORT-SPAN CONCRETE BRIDGES, SINCE THE TRANSVERSE POSITION SEEMS TO BE BASED ON A FIXED DISTANCE FROM THE CURB, OR FROM THE PARAPET IF THERE IS NO CURB. THE INFLUENCE EXERTED ON TRANSVERSE POSITIONS BY THE HEIGHT OF THE PARAPET SEEMS TO BE NEGLIGIBLE ON CONCRETE DECK-TYPE STRUCTURES. RESULTS FOR THE ONE HIGH STEEL TRUSS STUDIED INDICATE THAT SUCH STRUCTURES SHOULD BE 4 OR 5 FT WIDER THAN A DECK TYPE FOR A GIVEN WIDTH OF ROADWAY. /AUTHOR/
Supplemental Notes:
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