How to Rotate Roads in Splines?

I have a question of how can I rotate the roads in Splines but not the spline the road it self… The road would be sideways when I place it with the spline and when I try to rotate it, it just does the spline and not the road. I have look at tutorials and I didn’t find anything on how to rotate the road it self. Can anyone please help me?

Here’s the screenshot of what I’m talking about:

Rotate the texture 90 degrees.