Well make fun of my suggestions if you all must but in 6 months you'll see the need. Just like the numbered cones.

Hardesty's has nice white walls on the far side of the track that helps one see their vehicle better from a distance. That might've been an option also.

Next, the hoops are a good idea. They would work better if they were of a heavier guage, longer and have barbs on the shaft to keep them securely in the ground.

Flame away....