Start by placing a spike factory on the edge of the map, near the exit. As with many multi-lane tracks, a Dartling Gun can fire down both lanes if placed on the far-left side, which should be done by around wave 5. The key will be to set as many 3-X or X-3 Dartling Guns as possible, all firing into both lanes, effectively creating a "death zone." A sniper monkey can be deployed to take care of any ceramics, especially those that spawn from MOABs. A banana farm can help with the later upgrades if necessary. In the later rounds, a 3-X Ice Tower slow all bloons if placed near the beginning of the track. Ideally all towers will be upgraded to 3-X by the end.