YOU SAID:
The car turned left on the interstate
INTO JAPANESE
車は州間高速道路を左に曲がった
BACK INTO ENGLISH
The car turned left at the interstate freeway
INTO JAPANESE
車は州間高速道路で左に曲がった
BACK INTO ENGLISH
The car turned left at interstate highway
INTO JAPANESE
車は州間高速道路で左に曲がった
BACK INTO ENGLISH
The car turned left at interstate highway
That didn't even make that much sense in English.