Copying and pasting my comment from reddit:
The 1/2 ones are called Wood Wedge Tip and Wood Wedge Incline.
The 1/4 ones are called Wood Narrow Wedge Tip, Wood Narrow Wedge Low, Wood Narrow Wedge Mid and Wood Narrow Wedge Top.
I literally made the ramp myself so I know which blocks I used to...
The 1/4 blocks that are in creative mode aren't in survival mode. It would be nice if they could be put into survival please. Currently land vehicles aren't able to make a jump with the 1/2 blocks - they really struggle making it up that steep slope and lose all momentum.
Reference picture to...