In this vanilla-friendly and multiplayer-friendly data pack, dirt paths, polished blocks, concrete, and most brick types increase player movement speed.
Additionally, placing any of these blocks directly below another block will cause that block to also grant this speed bonus, meaning you can make paths out of any block. This speed bonus stacks with all other speed bonuses including potion effects and ridden mobs.
Type /function m_paths:config to open the in-chat config menu to disable/enable the data pack and adjust the speed bonus on paths (defaults to +15%).