Road Items

Bloons Tower Defense 6 has a surprising amount of Road Items, each special.

Road Spikes
Road Spikes are the first Road Item you unlock, at Rank 5. One stack can pop up to 11 bloons by default. Typically, a stack costs $25 in easy, $30 in medium and hard, $35 in insane, and $40 in impoppable. Road Spikes can pop any type of bloon, barring Leads and DDTs.

Pineapple
Pineapples are the second Road Item you unlock, at Rank 10. A pineapple is dropped on the track and explode after 3 seconds, popping two layers off of bloons in a decent area. One pineapple typically costs $20 in easy, $25 in medium and hard, $30 in insane, and $35 in impoppable. Pineapples hurt all kinds of bloons, barring Blacks, Zebras, and DDTs. Using a Pineapple on a Lead will result in four Pinks instead of two Blacks.

Monkey Glue
A road item from BTDs 2 through 4, the Monkey Glue is back. It is made moderately obsolete by the Glue Gunner's great upgrades but still retains its utility if Glue Gunners aren't an option. It is the third Road Item you unlock, at Level 15. Monkey Glue acts like 1/0 Glue Gunner glue, holding on to the current layer for a long time. One splatter can glue up to 20 bloons. It typically costs $10 in Easy, $15 in medium and hard, and $20 in insane and impoppable. Monkey Glue can stick to every bloon type, except for MOAB-class bloons.

Cleansing Foam
Formerly just what a 3/x Monkey Engineer used, Cleansing Foam has been upgraded to its own road item. Unlike Monkey Engineer foam, the Road Item lasts until the end of the round but has limited uses, vanishing after cleansing 15 bloons. Bloons that pass over but don't lose a status or, in the case of Leads and Tins, popped do not count as "cleansed". It typically costs $20 in easy, $25 in medium and hard, $30 in insane, and $35 in impoppable.