How is the other driver characterized?

The other driver is characterized as fast and careless because this suggests they are driving at high speeds without paying attention to safety or the rules of the road. This characterization implies a lack of responsibility and awareness, which can lead to dangerous situations for themselves and others on the road. Being "fast" indicates a concern with speed, while "careless" points to a disregard for necessary precautions while driving, portraying a driver who may take risks that could result in accidents. In this context, the description effectively communicates the recklessness of the other driver's behavior.