code: def LatLngsToGoogleUrl(source, destination, dt):
    
    params = {"saddr": FormatLatLng(source),
              "daddr": FormatLatLng(destination),
              "time": dt.strftime("%I:%M%p"),
              "date": dt.strftime("%Y-%m-%d"),
              "dirflg": "r",
              "ie": "UTF8",
              "oe": "UTF8"}
    url = urlparse.urlunsplit(("http", "maps.google.com", "/maps",
                               urllib.urlencode(params), ""))
    return url
docs: Return a URL for routing between two (lat, lng) at a datetime.