The odd-even rule, which restricts the movement of cars based on their numberplates, will be reintroduced in Delhi next week to combat air pollution. The rule was previously implemented in 2016 and 2019 but was discontinued in 2017 due to the National Green Tribunal's refusal to exempt two-wheelers. Studies have shown mixed results on the effectiveness of the rule, with some indicating a reduction in congestion but minimal impact on air pollution levels. Experts suggest that the rule should be part of a long-term strategy to combat air pollution in the city.