Riding in a cart is seen as a weakness by the Dothraki, who prefer horse riding. In their culture, carts are reserved for cripples, eunuchs, pregnant women just before the time of giving birth, the very old or very young people.
After the battle at Rook's Rest, the head of Meleys was brought back to King's Landing by the forces of King Aegon II Targaryen and drawn on a cart through the city, awing the smallfolk into silence.
In 132 AC, Lord Benjicot Blackwood's carts were attacked by outlaws while he was on his way to Winterfell for the wedding of his aunt, Lady Alysanne Blackwood, to Cregan Stark the Lord of Winterfell.
A Game of Thrones
Khal Drogo offers Prince Viserys Targaryen a place in a cart instead of walking on foot. Viserys accepts not knowing this is a great insult in Dothraki culture. This earns Viserys the nickname Khal Rhaggat, the Cart King.
You're bold enough to be a Stark. Yes, I should have come sooner. If not for my Hand, I might not have come at all. Lord Seaworth is a man of humble birth, but he reminded me of my duty, when all I could think of was my rights. I had the cart before the horse, Davos said. I was trying to win the throne to save the kingdom, when I should have been trying to save the kingdom to win the throne.
- A Storm of Swords, Chapter 73, Jon X.
- A Dance with Dragons, Chapter 6, The Merchant's Man.
- A Dance with Dragons, Chapter 69, Jon XIII.
- A Clash of Kings, Chapter 42, Davos II.
- A Feast for Crows, Chapter 4, Brienne I.
- A Storm of Swords, Chapter 7, Jon I.
- A Game of Thrones, Chapter 36, Daenerys IV.
- The Princess and the Queen.
- Fire & Blood, The Dying of the Dragons - The Red Dragon and the Gold.
- Fire & Blood, Under the Regents - The Hooded Hand.
- A Storm of Swords, Chapter 76, Jon XI.