The State of New York in 2019 implemented congestion pricing, where drivers have to pay a toll for each vehicle entering Manhattan below 60th Street (except for the FDR Drive and the West Side Highway). Suburban counties in upstate New York challenged this in court, arguing that it unfairly impacts residents from Orange and Rockland Counties. The Court of Appeals finds the congestion pricing thing is legal.
The case is County of Rockland v. Triborough Bridge and Tunnel Authority, issued on July 13. Orange County asserts a right to travel claim under the Constitution. Such a principle exists, though the Constitution does not explicitly say it. As the Second Circuit (Calabresi, Park and Merriam) notes, the source of this right "has proved elusive," but we infer it from various constitutional provisions, like the Privileges and Immunities Clause and the Due Process Clause. But in the end, "the right to migrate is firmly established."
That does not mean Orange County can proceed with the case, the Court of Appeals holds. Cases have long held that toll charges do not violate the right to travel if the toll is based on a fair approximation of state facilities (like a bridge or highways), it is not excessive, and it does not discriminate against interstate commerce. That test is from Northwest Airlines v. County of Kent, a Supreme Court case from 1994.
Orange County agrees the toll does not discriminate against interstate commerce, but its argument that the toll is not based on a fair approximation of the use of state facilities fails, as the toll proceeds are not required to be used in a specific way in order to benefit the toll-payers. The Court finds the toll "aims to benefit all toll payers by reducing traffic congestion" in that part of New York City. Nor is the toll excessive in relation to its benefits, as it does reduce traffic congestion.
The equal protection challenge also fails, under the "rational basis" test, which says a government program that distinguishes between different people is legal if there is any rational justification for it. Really, anything goes under the rational basis test. The rational basis is that the money goes toward capital funding for mass transit, including subways, and to protect public health, presumably from too much traffic and pollution. As these are legitimate government interests, the equal protection challenge is rejected.