Backplates on traffic signals improve visibility of the lights by placing them in a controlled-contrast background. Retroreflective borders added to the backplate improve visibility in both daytime and nighttime conditions. This addition is also beneficial during power outages when signals may otherwise be dark and less noticeable.

All new City of Pittsburgh traffic signals will be installed with 12” diameter lenses. Studies have shown that increasing the signal lens size from 8” to 12” can have a significant reduction in vehicular crash frequency.

Unlike traditional signals that employ "yield-on-green" indications, Flashing Yellow Arrow turn signals (FYA) feature a flashing yellow arrow in addition to standard solid red, yellow, and green indicators. FYA signals otherwise function identically to traditional signals. The implementation of the yellow arrow helps make intersections safer, as the arrow is more easily understood by drivers, and reduces delays when traffic is light.

These installations are a standard pedestrian signal head with an added display showing a countdown of the remaining crossing time. This assists pedestrians and improves safety by sharing information about the amount of time left to safely cross the street before traffic signals change.

The City of Pittsburgh typically implements "Leading Pedestrian Intervals" (LPIs) as part of traffic signal upgrade projects. Also known as “pedestrian head start” or “delayed vehicle green,” this application improves pedestrian safety by allowing them an advanced start into the intersection, enhancing visibility and helping reduce conflicts with turning vehicles. The implementation of an LPI is not possible without having pedestrian signal heads in place.

These are device installations that share information about the WALK and DON'T WALK phases at signalized intersections in non-visual manners for those who have impaired vision. These methods include audible instructions, vibrating buttons, etc.

The City of Pittsburgh, in certain instances, will use partial or full traffic responsive control systems. These systems depend on their ability to sense traffic for efficient traffic control. DOMI currently uses non-pavement invasive detection systems, using radar or video image detectors.

DOMI assesses the need to add LED streetlights to traffic signal projects. The City currently uses a mixture of High-Pressure Sodium (HPS) and LED light installation. Because they rely on older technology, HPS lights are less durable and energy efficient than LEDs. Additionally, the updated LED lighting provides increased visibility, improved safety for all users, and faster lighting repair/replacement times.