在Google Maps API v3中找到最短和最快路线的优雅方式？

I am making a taxi fare calculator. One of the business requirements is that, the company wants the shortest and fastest route options. I know Google directionService by default searched for the fastest route. I set the "avoidhighways" option in request parameter to true in order to get the shortest route, but I am not quite happy with the result.I am making a taxi fare calculator. One of the