This Data Pack give players and some entities a speed boost if they stand on certain blocks
Two versions available in the releases folder.
###Blocks: Smooth Stone, Smooth Sandstone and Smooth Quartz Grass Path works for other entities, but the second version will also give players speed.
###Entities: Mostly rideables entities. Horses, Mules, Donkeys, Skeleton Horses, Llamas, Trader Llamas, Pigs with saddle.
###More info: This video explains all the behavior: https://youtu.be/wxqVpSWZdzE