Arterial road

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Arterial road

An arterial road or arterial thoroughfare is a high-capacity urban road that primarily functions to deliver traffic from collector roads to freeways or expressways, and between urban centers at the highest level of service possible. Arterial roads are a critical component of the road hierarchy and are designed to carry large volumes of traffic over long distances.

Characteristics[edit | edit source]

Arterial roads are characterized by their ability to handle high traffic volumes and their role in connecting major points of interest within urban areas. They typically feature multiple lanes, traffic signals, and are often designed to accommodate higher speeds than local streets. Arterial roads may also include features such as medians, turn lanes, and traffic signals to manage the flow of traffic.

Function[edit | edit source]

The primary function of arterial roads is to provide efficient movement of traffic across urban areas. They serve as the main routes for public transportation, emergency vehicles, and commercial vehicles. Arterial roads also facilitate access to business districts, industrial areas, and other significant urban destinations.

Design Considerations[edit | edit source]

Designing arterial roads involves several considerations to ensure safety and efficiency. These include:

Lane Width: Arterial roads typically have wider lanes to accommodate higher speeds and larger vehicles.
Traffic Control: The use of traffic signals, signage, and road markings to manage traffic flow.
Access Management: Limiting the number of direct access points to reduce potential conflict points and improve traffic flow.
Pedestrian and Cyclist Facilities: Incorporating sidewalks, crosswalks, and bike lanes to ensure the safety of non-motorized users.

Examples[edit | edit source]

Examples of arterial roads include major city streets such as Broadway (Manhattan), Sunset Boulevard, and Michigan Avenue (Chicago). These roads are essential for the movement of people and goods within urban areas.