Show threadKorawich KaveeApr 4
Based on a part of our recent study #LPI at night moves pedestrians out of the dark curb zone and help pedestrians get peak semi-cylindrical #illuminance for incoming traffic occurs around 2–3 seconds into crossing. At a #walking speed of 1.4 m/s, our #SALUSLux simulation indicates an ideal LPI of 3–7 seconds. For pedestrians facing turning conflicts (and I personally experience this a lot even near #CMU campus -*-), peak visibility on the far side occurs around 7 sec
Dr. John Barentine FRASOct 7, 2025

More research suggesting a limit to street #lighting in terms of obstacle detection efficacy at high light levels: “Detection accuracy plateaued when maximum, average, and minimum #illuminance (Emax, Eave and Emin) reached 6.7 lx, 1.94 lx and 0.98 lx, respectively—indicating no additional benefit to obstacle detection beyond these thresholds.

“https://www.sciencedirect.com/science/article/pii/S2590123025036278