I was thinking about taking the expressway but it's a waste of money so I went by the local roads instead
I thought about taking the motorway but I decided to take the local roads instead to save money
「高速道路」＝ the motorway（主にイギリス英語, the freeway, the expressway （アメリカ英語）
「下道」＝ ordinary roads, minor roads, local roads
「お金もったいない」＝ a waste of money
「高速で行こうと思ったけどお金勿体無いから下道で行ったよ」＝ I was thinking about taking the expressway but it's a waste of money so I went by the local roads instead
I thought about taking the motorway but I decided to take the local roads instead to save money
※「instead」＝ 「その代わりに、代わりに」
※ 「to save money」＝ 「節約するために」
イギリス 
