Tayo (voiced by Osian Gatehouse in UK, seasons 1-2, Teresa Gallagher in UK, season 3-onwards, Robyn Slade in US, seasons 1-2, Rob Rackstaw in US, season 3 only, Hayden Rolence in US, season 4-onwards) is a playful blue bus and can sometimes be mischievous. He is Rogi's best friend and sometimes fights with him. However, Lani used to make them up. He is the first bus that likes to fart. He is based on a Hyundai Super Aero City. In "The Relationship", Tayo gasped in shock when Lani admitted that she had a crush on Tayo.
Rogi (voiced by Keith Wickham in UK, seasons 1-3, Blake Harrison in US, season 4-onwards, Nolan Balzer in US, seasons 1-3, William Hope in US, season 4-onwards) is a green bus who's Tayo's best friend and sometimes fights with Tayo. However, Lani used to make them up. Rogi is a funny and mischievous green bus and is usually teased as a sleepyhead. Like Tayo, he is based on a Hyundai Super Aero City. Sometimes he acts like a speedboat.he often teases his younger sister Lani about his crush on Tayo. he has a crush on Nuri but Nuri doesn't return his feelings.he is the older brother of Lani.
Lani (voiced by Emma Tate in UK, Kami Desilets in US, seasons 1-4, Brigid Harrington in US, season 5-onwards) is a cheerful yellow bus who cannot stand arguments. She used to make Tayo and Rogi up. She is also very kind, cute, happy, sweet and sensitive. She is based on a Daewoo BS090. When she often snores loudly, Rogi calls her "sleepy-engine oil". Sometimes in most episodes Lani joins in the fight with Tayo and Rogi. she is the younger sister of Rogi.
Gani (voiced by Steven Kynman in UK, Kerri Salki in US, seasons 1-4, Richard Ian Cox in US, season 5-onwards) is a hardworking, warm-hearted and shy red bus. He is based on a Daewoo BS106. he is the sane one of the main six. He is the love interest of Hotshot Cecily. Citu (voiced by Keith Wickham in UK, Tim Bandfield in US) is a red double decker bus who takes the little buses on a tour around the garage and back again. He is based on the Neoplan Skyliner Bus.
Nuri (voiced by Teresa Gallagher) is an orange calm taxi girl. She is really nice to Tayo and his friends. She can a bit Harsh to Rogi at times and is perfect for dropping and taking passengers.
Hana is a mechanic who takes care of the little buses and works in the repair shop. She can be make Tayo, Rogi & Lani annoyed at times and makes friends with Gani.
Rookie (voiced by Tim Whitnall) is a police officer who sometimes goofs up with his job because he is new to it.
Pat (voiced by Duncan Wisbey) is an experienced police car who is always serious in working. He & Rookie got blamed by Tayo & Rogi in " Pat & Rookie Get The Blame". She hates when Rogi flirts with her.
Speed (voiced by Osian Gatehouse in UK, Joseph May in US, seasons 1-2, Reid Scott in US, season 3-onwards) is a red car who likes to go really fast. He is Based on a Porsche 911.He has a massive crush on Heart.
Shine (voiced by David Holt) is an overproud yellow car who likes to show off. He is Based on the Mercedes-Benz SLK R171.
Toto (voiced by Paul Panting) is a yellow tow truck who is really responsible with his job.
Toni (voiced by Rebecca O'Mara in UK, Andrea Libman in US) is a little white truck who obeys traffic laws and teaches other cars about traffic laws. Also, he likes delivering post and mail. He is quite short tempered.
Alice (voiced by Maria Darling) is an ambulance who works in a hospital who likes to work with Frank when there is a fire.
Frank (voiced by John Hasler) is a fire truck who works with Alice when there is a fire. He is very serious about his job and is very determined to help a friend in need.
Big (voiced by David Holt) is a big container truck who delivers goods to the airport to be sent overseas. He is based on the Scania R470 truck.
Billy (voiced by Rob Rackstraw) is a yellow bulldozer who works at the construction site with Poco, Chris, Squishy and Max. He is the boss of the construction crew and always knows when it's time to get to work!
Poco (voied by Mark Moraghan) is a yellow excavator who digs tons of soil, dirt and mud. He works at the construction site with Billy, Chris, Squishy and Max. Always, he likes getting dirty and hates car-washes.
Chris (voiced by Joe Mills) is an orange cement mixer who works at the construction site with Billy, Poco, Squishy and Max. He is friends with Squishy the steamroller and can sometimes get up to some mischief with him.
Max (voiced by Steven Kynman) is a green dump truck who carries away dirt. He works at the construction site with Billy, Poco, Squishy and Chris. He should not to be confused with Max the Dump Truck from Thomas and Friends.
Squishy (voiced by Jason Pace) is a red steamroller who works at the construction site with Billy, Poco, Chris and Max. He is friends with Chris the cement mixer and can sometimes get up to some mischief with him.
Porter (voiced by Kerry Shale) is a rainbow-coloured fun bus who takes children to the party.