Speed limits in the United States by jurisdiction

US Speed Limits

Speed limits territories2

Dalton Highway facing south from Deadhorse

075 Plants washed onto road at Post Office 9-29-09075

FloridaSpeedLimitNames

GeorgiaSpeedLimitsMap

Speed limits in the United States by jurisdiction vary significantly through its many jurisdictions, including 50 states, federal districts, territories, and Native American reservations. Each jurisdiction has its own set of laws and regulations regarding maximum speed limits on roads, highways, and freeways. This article provides an overview of these regulations, highlighting the diversity in speed limit policies across the country.

Overview

In the United States, speed limits are established to enhance road safety, manage traffic flow, and in some areas, to control pollution. Speed limits are typically posted in miles per hour (mph) and are determined by a variety of factors including the type of road, the density of development in the area, and the presence of pedestrian traffic.

Federal Influence

While individual states have the authority to set their own speed limits, the federal government has historically influenced speed limit policy. For example, in 1974, Congress established a national maximum speed limit of 55 mph as a response to oil shortages. This was later amended by the National Maximum Speed Law in 1987, allowing states to increase limits to 65 mph on certain roads. The federal influence was further reduced in 1995 with the repeal of the National Maximum Speed Law, after which states were free to set their own speed limits.

State Speed Limits

Each state sets its own speed limits, with maximum limits ranging from 55 mph to 85 mph on rural interstates. States like Texas and Utah have some of the highest speed limits in the country, allowing speeds up to 85 mph on certain segments of their roadways. In contrast, states such as Hawaii have lower maximum speed limits, with no roads allowing speeds over 60 mph.

Urban and Rural Differences

Speed limits also vary within states based on urban or rural designations. Urban areas typically have lower speed limits due to higher traffic volumes and the presence of pedestrians. Rural areas, with less congestion and fewer crosswalks, often allow for higher speed limits.

Special Jurisdictions

Beyond the 50 states, other jurisdictions such as the District of Columbia, Puerto Rico, and various Native American reservations have their own speed limit regulations. The District of Columbia, for example, has a maximum speed limit of 55 mph, reflecting its urban density. Native American reservations can set their own speed limits on roads within their territories, which may differ from those of surrounding states.

Enforcement

Speed limit enforcement varies widely across jurisdictions and can include traditional police patrols, automated speed cameras, and aerial enforcement. Penalties for speeding can range from fines to points on a driver's license, and in severe cases, imprisonment.

Conclusion

Speed limits in the United States are a complex patchwork of regulations that reflect the diverse geography, population density, and safety considerations of the country. As road conditions and societal attitudes towards driving and safety evolve, speed limit policies continue to be reviewed and adjusted by jurisdictions across the nation.