"Right, I'll check your work, OK?" "Please go ahead and inspect. I think I gave it a good go."
「じゃあ、チェックしちゃいますね」「審査宜しく。頑張ったつもりだぜ」
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.