It's your duty to care for your parents regardless of the inconvenience.
便宜に関わらず自分の親の世話をするのは義務である。
Can I open the window?
窓を開けても宜しいですか。
Television has the advantage of providing sports fans with greater convenience.
テレビはスポーツファンに一層大きな便宜を与える、という長所を持っている。
In other words, the merits, etc. of making detours are the consideration of the attitudes of the landowners whose property the line would cross, the convenience of other towns and villages, as well as connection with other railway lines.