one way space warp

i've been commuting to and from work by rickshaw for almost every single day of the past few weeks at my new job. it's not exactly cheap, but it saves me the pain of train travel, and cuts my travel time to half, if not less. i've noticed one very weird thing though: the rickshaw fare invariably is higher on my way to work in the morning, than on my way home in the evening. surprisingly, that's despite there being much less traffic in the morning (it takes me 20-25 minutes to work, but 35-45 minutes to get back home). there are no one-way diversions or anything else of the sort either. in fact, it's a perfectly straight road from about 200 metres from my office to about 200 metres away from my home, and the difference is about 5rs on an average (about half a kilometre, by rule of thumb). absolutely inexplicable. i still haven't the slightest clue on how i can explain it.

i guess it's just another one of life's mysteries :D