Noun and の adjective
かたみち
大阪から東京までの片道切符を二枚もらえますか。
Can I get two one-way tickets from Osaka to Tokyo?
A one sided street is for one way only, because everything just goes in one direction.
The readings are the kun'yomi readings. You learned the reading from 片 already, and 道 is the vocab reading みち.