servicesroads

Services roads, commonly referred to as service roads or frontage roads, are secondary roads that run parallel to a higher-capacity highway, arterial, or expressway to provide access to adjacent properties and local streets. They reduce direct access to the main road, help manage traffic flow, and support local trips, deliveries, and emergency response.

Typically they have dedicated intersections or driveways, may be one-way or two-way, and are often separated from the main road by medians or barriers. In many regions they are part of an access-management strategy, improving safety by distributing turning movements and reducing conflict points. They may include bus stops, bike lanes, and pedestrian facilities.

Common in North America as frontage roads along interstates and major toll highways, they are also used along urban expressways and around large corridor developments. The exact design and naming vary, with terms like frontage road, service road, or access road used depending on jurisdiction.

Planning and maintenance involve coordination between highway authorities and local governments. Factors include land use, property access, traffic volumes, emergency access, and maintenance funding. Critics note potential confusion for drivers and higher cost for right-of-way and upkeep, while supporters highlight improved safety and local accessibility.

In summary, services roads are an integral part of modern road networks, balancing high-speed through traffic with local access and development needs.