What is the safest opening for Level 47?

Use the exposed cyan bus first, then the yellow and red matches that open the lower oval and central arc.

What does No spots available mean here?

The regular holding bays are occupied. Wait for an active bus to depart before dispatching another bus.

No. Leave them in the queue; the known-color buses are enough to clear the board.

Bus Fever Party level guide

hard 9 colors

Cyan, yellow and red open the short U. The tempting top red bus and the dark ? buses are what trigger the repeated No spots available pauses.

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Dispatch the exposed cyan bus and let it collect the lower-right group until a bay releases.
Use the yellow match for the lower arc, then bring in the red match that becomes useful around the lower center.
Add blue and green as the right arm and left bend open, waiting for their counters to drain.
Feed the purple and brown inner groups only after a departure exposes them around the small oval.
When No spots available appears, stop tapping until the active cyan, red, yellow, or blue bus leaves.
Clear the remaining cyan, red, purple, and green tail and wait for GREAT JOB!.

Colors in this level:

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

Do not tap the top red bus simply because it is visible while the holding row is occupied.
Do not use a dark ? bus as though its color were already known.

Start with the cyan bus and use the lower yellow and red arc to create the first departures.
Do not fill the row with a top red bus or a ? bus while cyan and blue counters are active.
Use the small oval opening as the route landmark for the purple and brown late phase.

Board notes 5 details

Layout: A compact U-shaped passenger loop surrounds a small oval opening. Green and red sit on the left bend, yellow spans the lower arc, cyan and blue occupy the right bend, and purple and brown form small inner groups. The lower queue mixes known colors with several dark ? buses.
Goal: Clear the lower cyan and yellow arc and right bend first, then work the left red and green side without occupying the row with hidden-color buses.
Opening: The first useful dispatch is cyan, followed by yellow and red as the lower oval opens; blue and green become useful after departures expose the two bends.
Danger Zone: No spots available appears repeatedly once cyan, red, yellow, and blue counters are active. Wait for a departure instead of tapping the tempting top red or a dark ? bus.
Mechanics: The compact U packs seven colors around a small oval opening, and cyan, red, yellow, and blue can all be boarding at the same time.

What is the safest opening for Level 47?
Use the exposed cyan bus first, then the yellow and red matches that open the lower oval and central arc.
What does No spots available mean here?
The regular holding bays are occupied. Wait for an active bus to depart before dispatching another bus.
Are the dark ? buses required?
No. Leave them in the queue; the known-color buses are enough to clear the board.