What specific strategies can taxi drivers employ to effectively manage and de-escalate road rage incidents, particularly in high-stress environments where the drivers livelihood is dependent on maintaining a high level of customer satisfaction, while also ensuring the safety of themselves and their passengers, and what role do factors such as driver training programs, vehicle design, and urban planning play in mitigating the occurrence of road rage incidents in the first place, and are there any notable differences in the approaches taken by taxi drivers in different cities or regions to address this issue, and how do these approaches impact the overall driving culture and safety record of taxi services in those areas.