A nighttime study of the motion and light of interstate highways.
3m
6.0·2013
6.8·2021
7.1·1948
8.1·2011
6.1·1954
7.6·2014
6.9·2022
7.5·1991
7.4·2002
7.1·2008
6.5·1959
6.1·2016
7.5·2017
6.1·1963
6.6·1945
6.1·2025
5.8·1983
7.1·2019
8.2·2018
7.4·2012
