$[157]$: function creates and builds a model of a bridge based on the specified truss kind and then ac tarts by creating a new SystemElements object from the anastruct module. meters: uss$\_$design is a string describing what kind of truss to use $($either 'Warren' or 'Howe'$)$ rizontal$\_$span$\_$length is the total distance that the bridge spans $($from the leftmost bottom ver mber$\_$of$\_$segments is the integer number of segments across the bottom of the bridge. ight$\_$per$\_$metre is a number representing the weight of the road surface and vehicles per horizon rn value:

e SystemElements object representing the bridge model $($with all vertices, elements, loads and s ild bridge$($truss design, horizontal$\_$span$\_$length, number$\_$of$\_$segments, weight$\_$per$\_$metre$)$ : # do n