A proposed pay-per-mile car tax has raised concerns about its potential impact on certain groups of drivers. Experts warn that those who rely heavily on their vehicles, such as residents of rural areas, commuters, and low-income households, could face disproportionately higher costs. The new tax structure would consider both mileage and emissions, potentially leading to increased financial burdens for those who drive frequently or own vehicles with higher emissions. Critics argue that the tax could discourage driving, particularly in areas with existing congestion charges. However, the government has denied any plans to implement such a policy.