Fix for Transit Background. (#193)

Author: JamesVaughan

TMGToolbox/src/XTMF_internal/multi_class_road_assignment.py

@@ -627,7 +627,7 @@ def process_term(term):
         return [process_term(x) for x in range_str.split(',')]
 
     def _getTransitBGSpec(self):
-        ttf_terms = str.join(" + ", ["(ttf >="+str(x[0])+" * ttf <= "+str(x[1])+")" for x in self.on_road_ttfs])
+        ttf_terms = str.join(" + ", ["((ttf >="+str(x[0])+") * (ttf <= "+str(x[1])+"))" for x in self.on_road_ttfs])
         return {
                 "result": "@tvph",
                 "expression": "(60 / hdw) * (vauteq) * ("+ttf_terms+")",