What makes Bus Traffic Fever! Level 275 so much longer than the others?

The level has both a diagonal ladder on the floor and a late black-brown ring in the lane. You have to preserve the dark reserve for much longer than usual.

Which move is the most important one to delay on Level 275?

Delay the lower-right black bus. It is the cleanest late-game answer once the ring around the island turns dark.

Bus Traffic Fever! level guide

Bus Traffic Fever! Level 275 Walkthrough

hard 10 colors

Bus Traffic Fever! Level 275 is the marathon board of this range. Collapse the diagonal ladder from its bright centerline first, keep the lower-right black singleton untouched, and spend the dark reserve only after the lane turns into a long black-and-brown ring around the island.

Board Notes

Layout: The floor is a slanted X-like ladder with a rainbow chain down the main diagonal, short side branches on the upper-left and lower-left, and a black singleton parked at the lower-right edge. Overhead, the lane wraps around a central island and eventually builds thick black and brown walls around the opening.
Goal: Strip the bright diagonal buses while banking the late dark pieces. The board wins only if the dark reserve survives until the lane reaches its long black-and-brown phase.
Opening: The video works down the exposed diagonal chain, feeding pink, cyan, yellow, and green from the middle while ignoring the isolated black bus in the lower-right corner.
Danger Zone: Spending dark buses too early is fatal here. Once the lane closes into its black-and-brown ring around the island, those dark buses are the only clean fuel left.
Mechanics: Level 275 combines two layers of timing. The floor is a diagonal ladder, but the lane revisits the same colors in longer blocks, so the solve depends on holding back the right pieces for much later.

Quick Tips for Bus Traffic Fever! Level 275 (spoiler-free)

If the lower-right black bus leaves early, the ending usually collapses.
With 10 colors in play, clear the pair with the fewest blockers first so the board opens up instead of tightening.
Think in chain clears. The best move is the one that sets up the next two moves, not just the quickest current match.

How to Solve Bus Traffic Fever! Level 275 — Full Solution

Begin on the main diagonal, sending the exposed pink, cyan, yellow, and green buses from the center of the ladder instead of the isolated black bus.
Use the short upper-left branch only when its colors match the front of the lane; do not break that branch just to empty space.
Keep walking down the diagonal chain so the lane can finish its long bright-color phases before the dark ring closes around the island.
Hold the lower-right black singleton and the other dark buses until the lane visibly turns black and brown around the island, then feed them in one controlled run.
Finish the last pink and cyan diagonal leftovers after the dark ring loosens and the board has become a short open chain.

Colors in this level:

Black, Blue, Brown, Cyan, Green, Orange, Pink, Purple, Red, Yellow

Common Mistakes to Avoid

Spending the lower-right black singleton during the first half of the run.
Tearing apart the upper-left branch before the lane is actually asking for its colors.

Frequently Asked Questions

What makes Bus Traffic Fever! Level 275 so much longer than the others?
The level has both a diagonal ladder on the floor and a late black-brown ring in the lane. You have to preserve the dark reserve for much longer than usual.
Which move is the most important one to delay on Level 275?
Delay the lower-right black bus. It is the cleanest late-game answer once the ring around the island turns dark.