How do you think Chrétien might be using Lancelot's decision to ride in the cart to reflect on the advantages and disadvantages of chivalry?

Chivalry, the code of conduct by which medieval knights were bound, is unsurprisingly a major theme of the work. Intrinsic to chivalry is honor, which is really the guiding principle of chivalrous behavior. A knight was expected first and foremost to act honorably, whether in his treatment of women, his behavior in battle, or his presentation to others. Much of the action in the story derives from the fulfillment (or lack thereof) of honor. Part of Chrétien's subversion is that Lancelot must often eschew the demands of honor in order to show devotion towards his beloved Guinevere. The titular cart ride is the clearest example of this. Much of Chrétien's brilliance comes from paying homage to the codes of chivalry while suggesting that they often work in direct counterpoint to an individual's own desires.