Alley, Back Street
noun
A backside street (or "avenue") is a street that's not a main street... it's hidden and behind everything, making it an alley.
うらどおり
The reading is 裏 and 通り put together into one word.
レーシングカーは、裏通りを縫うようにして走っていった。
The race car sped, weaving through the side streets.