A new study provides a detailed picture of the health impacts attributable to emissions from four transportation subsectors: on-road diesel vehicles, on-road non-diesel vehicles, shipping, and non-road mobile sources such as agricultural and construction equipment.

Remote sensing is one technique used to measure real-world NOx emissions in Europe. Remote sensing measurements conducted by the Canton of Zurich are unique in terms of how consistently they have been collected since 2000 and the steep road grade at the main remote sensing monitoring site.

This briefing paper reviews the benefit-cost estimate developed by the National Highway Traffic Safety Administration (NHTSA) and the U.S. Environmental Protection Agency (EPA) to justify the Trump administration's August 2018 proposal to roll back the U.S. light-duty vehicle efficiency standards for 2020–2025.

While the Dieselgate scandal raised awareness of defeat devices—software calibrations that manipulate pollutant emission controls when vehicles are in the real world—third-party evaluation remains difficult because these devices are embedded in sophisticated computer code.

In adopting zero-emission vehicle (ZEV) regulations, questions remain regarding how quickly electric vehicle costs are declining and the magnitude of consumer benefits compared to conventional vehicles. This paper analyzes these two questions in the context of Colorado’s potential adoption of a ZEV regulation.

This briefing paper analyzes 2018 electric vehicle uptake in the United States and the policy factors that are driving it. The paper catalogues forty-three unique city, state, and utility electric vehicle promotion actions and their implementation across the 50 most populous U.S. metropolitan areas in 2018.

Market projections for electric vehicle growth in India are ambitious but uncertain. In addition, the passenger car CO2 standards enforced in India are amongst the most lenient, and the super-credit multipliers available for electric vehicles are more generous compared to global practices.

This briefing paper discusses key terms related to gas in the context of energy policy and climate change mitigation goals in the European Union. It also proposes a method of categorizing gas sources based on their GHG emissions intensity and illustrates how these categories can be used to refer to gas from different sources.

In January 2019, China launched a new action plan to address air pollution by cleaning up diesel-powered on-road vehicles, off-road equipment, and ships. This plan is one part of the larger, three-year National Plan of Blue-Sky Defense, and it places stricter requirements on air pollution-prone areas.

Spain is one of the strongest hybrid electric vehicle (HEV) markets in Europe in terms of total sales volumes and relative European market shares. This paper reviews how programs, regulations, and incentives at the national, regional, and local level have shaped the HEV market in the country.