Are chicken buses safe?

They are generally safe for transit, but petty theft can happen. Keep your valuables in a bag on your lap, never in the overhead racks or under the bus.

Do they run on a schedule?

No. They run when they are full or at the whim of the driver. Just show up and wait; one will arrive eventually.

Can I fit a large suitcase?

Avoid large suitcases. Use a backpack that fits on your lap. Anything large will be tied to the roof, which is risky for your gear.

How to Ride Chicken Buses in Guatemala

To ride a chicken bus, simply flag one down from the side of the road and pay the fare in cash to the attendant (the ayudante) once you are on board. Expect a crowded, loud, and bumpy experience that connects nearly every town in the country for a fraction of the cost of tourist shuttles.

Find the bus stop. In cities, ask locals for the 'parada' or head to the main bus terminal. In smaller towns, you can wait at any prominent corner or simply stand on the side of the main road heading in your direction.
Flag it down. When you see a brightly painted bus approaching, wave your hand clearly. They will pull over quickly, so be ready to hop on immediately; they rarely come to a complete stop.
Board and find a seat. Climb the steep steps. If the bus is full, you may have to stand in the aisle. Keep your backpack on your lap or between your feet, not on the seat next to you, to maximize space.
Pay the fare. The 'ayudante' (assistant) will swing through the bus to collect cash. Have small denominations (Quetzales) ready. A short ride usually costs 5-10 GTQ, while a long-haul trip costs 20-50 GTQ.
Signal your exit. When your destination is approaching, move toward the door or shout '¡Baja!' (I'm getting off!) to the driver or assistant. The bus will slow down just enough for you to jump off.

Are chicken buses safe?: They are generally safe for transit, but petty theft can happen. Keep your valuables in a bag on your lap, never in the overhead racks or under the bus.
Do they run on a schedule?: No. They run when they are full or at the whim of the driver. Just show up and wait; one will arrive eventually.
Can I fit a large suitcase?: Avoid large suitcases. Use a backpack that fits on your lap. Anything large will be tied to the roof, which is risky for your gear.