Pedestrian Crossing Buttons: Do They Actually Work?
Translated & summarized from Behadrei Haredim by baba
An investigation in Kfar Saba, Israel, found that pedestrian crossing buttons at traffic lights have varied effectiveness. While some buttons demonstrably shorten wait times, others have minimal impact or are redundant, with some units designed for the visually impaired rather than signal control.
The story in 5 lines · by baba
- Pedestrian crossing buttons have inconsistent effectiveness at traffic lights.
- Tests in Kfar Saba showed varied impacts on waiting times.
- Some buttons are designed to assist the visually impaired, not control signals.
- System complexity and other sensors influence traffic light timing.
- No evidence was found of intentional installation of non-functional buttons.
A recent investigation into the functionality of pedestrian crossing buttons at traffic lights has revealed a mixed reality, debunking the widespread notion that they are merely placebo devices. Doron Fishelr, as part of the podcast "HaTshuva" (The Answer), conducted tests at several intersections in Kfar Saba, Israel, to measure waiting times with and without button activation.
The results indicated that the buttons' effectiveness varies significantly. In some instances, pressing the button clearly expedited the pedestrian signal, while in others, the impact was minimal. In certain cases, the traffic light changed regardless of whether the button was pressed. For example, on Weizmann Street, Fishelr observed that without pressing the button, the pedestrian signal did not change during his test period. However, after pressing it, the green light appeared within 6 to 20 seconds. A subsequent test on a Saturday yielded different results: 22 seconds with a press and 22 seconds without, suggesting the system operates automatically on Saturdays.
At another intersection, a 60-second wait was recorded without a button press, compared to 50 seconds after pressing it. Fishelr explained that the button does not issue an immediate command but rather integrates into the intersection's management system, which also considers vehicle sensors, time of day, and programmed signal timings.
Furthermore, the investigation highlighted that not all buttons are designed to control traffic signals. Some yellow boxes, often equipped with buttons, are primarily intended to assist visually impaired individuals through auditory cues, vibrations, and tactile maps. While some of these may provide information about the intersection, they do not influence the traffic light's timing.
While the idea of "placebo buttons" isn't entirely unfounded, as evidenced by a 2004 report from New York detailing approximately 2,500 non-functional buttons left in place after system upgrades, Fishelr found no evidence of intentional installation of non-working buttons to deceive pedestrians. The investigation concluded that the buttons' functionality is inconsistent: they work in some locations, are redundant in others, and in some cases, serve a different purpose altogether.