Answer
Car was a notable method of transportation used by Smith-Cumming. During his tenure, the automobile became increasingly common, and Smith-Cumming recognized its potential for covert operations. He established a network of safe houses and meeting places accessible by car, enabling agents to travel discreetly and avoid detection. The use of cars also facilitated rapid communication and coordination among field operatives, enhancing the efficiency and effectiveness of Smith-Cumming's intelligence gathering efforts.