# Emission control areas: More or fewer?

> Research article (Transportation Research Part D Transport and Environment, 2020) · cited 28× · AI/ML

**Wikidata**: [openalex:W3025172927](https://www.wikidata.org/wiki/openalex:W3025172927)  
**Source**: https://4ort.xyz/entity/emission-control-areas-more-or-fewer