Street & Road Lighting
Street Lighting Design
TJW prepares street lighting plans on a daily basis for a variety of roadway classifications and agencies throughout California. Each design begins with the assessment of existing conditions to see how it would affect the proposed lighting scenario. The team then begins the street and roadway lighting design taking into account roadway classification, intended use, lighting spacing, fixture type, and safety and maintenance standards.
Specialized Lighting Design
In addition to the roadway adjacent street lighting, TJW also analyzes and prepares construction ready plans for in-street bollard lighting for bike lanes, flashing beacon systems for advance warning systems, pedestrian crossing safety lighting, roundabout (traffic circle) lighting, and train bus stop lighting.
Photometric and Lighting Analysis
TJW performs photometric calculations for all applications including straight away roadways and intersections using the latest version of Visual Lighting Software. For existing conditions, TJW has performed lighting analysis studies (LAS) to determine the adequacy of existing lighting using light meters, the modeling software, and the latest industry standards for acceptability.
Voltage Drop and Circuit Diagram Design
In each street lighting and roadway design, TJW provides the necessary details in order for a contractor to install the street and roadway lighting system to meet the agency standards. Voltage drop calculations, panel load schedules, and circuit diagram design are performed to ensure that the implementation of the lighting system will be functional for years to come.
Roadway lighting is an important supplement to individual vehicle lighting. Whether incandescent or LED, a crosswalk or a wide intersection, our team of experts is well versed in the correct type of lighting to maximize results in a variety of conditions. Proper lighting increases nighttime visibility for drivers to see debris, animals, or stopped vehicles in the roadway ahead of them and around them.
Drivers move along more confidently and competently on a well-lit roadway that gives them a sense of visibility and awareness of their surroundings.
When planning how to illuminate roadways, a few of the factors that we consider are:
- Types of vehicles
- Pedestrian traffic
- Time of year
- Placement intervals
In order to design street and roadway lighting, TJW references and utilizes the standards set forth by the American National Standard (ANSI), American Association of State Highway Transportation Officials (AASHTO), Illuminating Engineering Society of North America (IES), The Federal Highway Administration (FHWA), CALTRANS, and all applicable governing agencies in every project.