Would caltrops be viable?

These were essentially individual road spikes used in the Middle Ages that could slow down calvary, war elephants, and even other infantry. They would always have a spike facing up no matter which way it landed. Some civs are slower which often get countered by faster civs. Basically the top tier civs are fast civs and the bottom tier civs are slow more or less. Implementing this could counter the speed of fast units so slower units could catch them or buy a civ some time to produce more units/eco. Dragging a game out to play to your civ's strengths is just a viable strategy as rushing your opponent with speedy units. Thoughts?

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https://i.redd.it/jph5b6ypfkp31.png