Lower speed limits reduce total gasoline consumption
Multiple studies and traffic simulations demonstrate that lowering speed limits helps optimize engine efficiency and traffic flow, resulting in reduced overall gasoline and fuel consumption.
The claim is specific, empirical, and falsifiable regarding whether lower speed limits decrease total gasoline consumption. Papers [0], [1], [2], and [7] provide direct empirical or simulation-based support showing that reduced speed limits lead to lower energy and fuel consumption. The remaining papers are either about maritime transport [3], driver behavior [6], or biodiesel fuel blends [9, 10, 11] and are tangential. Therefore, the evidence strongly supports the claim.
Fiamma Pérez-Prada, A. Monzón. Ex-post environmental and traffic assessment of a speed reduction strategy in Madrid's inner ring-road. 2017. https://doi.org/10.1016/J.JTRANGEO.2016.12.018
This study evaluates a speed reduction strategy in Madrid and finds that lower speed limits lead to reduced fuel consumption and lower greenhouse gas emissions.
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Juan Chen, Yuxuan Yu, Qi Guo. Freeway Traffic Congestion Reduction and Environment Regulation via Model Predictive Control. 2019. https://doi.org/10.3390/a12100220
Simulation results show that variable and fixed speed limit strategies effectively alleviate traffic congestion, reduce emissions, and lower total fuel consumption.
José I. Castillo-Manzano, Mercedes Castro-Nuño, Diego J. Pedregal-Tercero. Temporary speed limit changes: An econometric estimation of the effects of the Spanish Energy Efficiency and Saving Plan. 2014. https://doi.org/10.1016/J.ECONMOD.2014.01.032
An econometric analysis of Spain's temporary maximum speed limit reduction shows that the policy had a positive effect on reducing fuel consumption.
George Yannis, Eva Michelaraki. Effectiveness of 30 km/h speed limit - A literature review.. 2025. https://doi.org/10.1016/j.jsr.2024.11.003
A systematic literature review indicates that implementing lower speed limits in cities has significant positive effects on energy consumption, including reduced fuel consumption.
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