网友查一下词典就知道了。
这里的came up the road是正确的， up是介词，相当于along。如《牛津词典》walk up (ie along) the road 沿着路走
再请看《韦氏高阶英汉双解词典》上的介绍：
up prep
1：to, toward, or at a higher point on (something) 往较高处，向较高处；在较高处
He climbed up the ladder. 他爬上梯子。
She had to walk her bike up the hill. 她不得不推着自行车上山。
The bathroom is up the stairs. 卫生间在楼上。
2：along the course or path of (something) 沿着……；顺着……
Go up the street/road and turn left. 沿着这条街/路走，然后左转。
We walked up the street to meet them. 我们沿街走过去接他们。
They live just up the block from us. 他们就住在我们前面的街区。
I paddled the canoe up the river. 我们沿着小河划独木舟。
The ship sailed up the coast. 这艘船沿着海岸航行。
Her office is all the way up the hall on the right. 沿大厅一路过去右侧就是她的办公室。
