Road Spikes are a Road Item that the player can place on the track if Bloons are about to escape. Each pile of spikes can pop 11 Bloons, which is enough to pop an entire Black/White Bloon. Road Spikes cannot pop Lead Bloons but they can pop Camo Bloons. Road spikes were first introduced in BTD2.
Cost: Easy: $25 | Medium: $30 | Hard: $30