A transportation network is vital to an economy. However, the U.S. highway infrastructure suffers from insufficient maintenance creating inefficiencies such as increased travel times and increase in accidents. The means to fund the infrastructure and their maintenance is a point of debate. In this paper, we examine the role of political institutions and decision‐making on the quality of highway infrastructure by focusing on the role of fiscal decentralization. Using generalized linear model estimation on state data from 1992 to 2012, we find evidence that fiscal decentralization improves infrastructure quality. These results are robust to the choice of control variables and method of estimation. (JEL D73, H42, H72)