Sentence:  And there are now many millions of workers for whom the factory with the big parking lot , which can be reached by driving across or against the usual pattern of <WSD>rush</WSD> hour traffic and grille route bus lines , is actually more convenient than the walk-to factory . 
Meaning of the word marked with <WSD> tags:  the times at the beginning and end of the working day when many people are traveling to or from work