Traffic signal

Q. It makes me wiggy to see people repeatedly pushing the walk button on traffic-signal poles. Over and over and over. Does that really speed up the process? Or are people just wearing out the button mechanism? – Pam Wright, Pasadena A. No and no. “Only the first push of the pedestrian cross button does anything,” Nathan Abler, a Caltrans spokesman, told Honk in an email. “Additional pushes are unnecessary.” Honk says if it reduces anxiety about trying to get across the street quicker, is just kinda fun or reduces boredom, then, please, push away. But otherwise, one might just refrain. Here’s what CHP wants you to do if you see drivers swerving all over the road Q. Near my home is a traffic signal that has a yellow reflective band of tape around the edge of the signal’s back plate. I have noticed these around random traffic signals here in Fullerton and in other Orange County cities and was wondering what is the purpose of this tape? – Tommy Reminiskey, Fullerton A. It is not tape, rather just the perimeter of what roadway experts call the traffic signal head – the red, yellow and green lights and the housing that holds them. Those yellow perimeters are popping up in California and elsewhere, especially in areas were a wildfire could break out. The reflective borders are meant to be picked up by headlights if the lights in the area go down and the traffic signal isn’t working. Motorists would see the signal head, know an intersection is there and treat the cross street as ...

Millions in federal cash has been awarded to upgrade traffic signals so that buses are given priority when moving through Chelsea, Everett and Revere. The U.S. Department of Transportation and Federal Highway Administration announced an MBTA project in those cities totaling $2.96 million under a grant program created through President Biden’s Bipartisan Infrastructure Law. “Your zip code shouldn’t determine whether you have access to safe, affordable transportation,” Transportation Secretary Pete Buttigieg said with the announcement. The project, which will complete design work next year and begin construction in 2025, will add technology to signal arrays that identify and allow buses to move more quickly through traffic, improving commute times for mass transit users and making transportation times more predictable. According to the MBTA, the communities covered by the grant are some the most desperate for easy bus connection to the transit systems’ other modes of travel, like the rapid transit and commuter rail. “Upgrades to come as a result of this award include the technology to create a regional Automated Traffic Signal Performance Measurement system that will support current and future intersections where the MBTA implements transit signal priority. This will result in more efficient bus service for residents who rely on transit to get to and from work, school, healthcare appointments, and recreational opportunities,” MBTA GM Phil Eng said with the announcement. Matt...

BAHANAGA, India/NEW DELHI, June 11 (Reuters) - An official probe into India's rail crash is focusing on suspected manual bypassing of an automated signalling system that guides train movement - an action investigators believe sent a packed express train into a stationary freight train, three Indian Railways sources told Reuters. The Commission of Railway Safety (CRS) investigators suspect the bypass was done by railway workers to get around signalling hurdles that arose from a malfunctioning barrier used to stop road traffic at a nearby rail-road intersection, two of the three sources said. The sources did not want to be identified as they are not authorised to speak to the media. The June 2 crash at Bahanaga Bazar station, in the Balasore district of the eastern Indian state of Odisha, killed at least 288 people and injured more than 1,000. It was India's worst rail crash in two decades. Indian and international media have previously reported that a possible However, details of the frequent malfunctions at the nearby rail-road barrier and its possible connection to a manual bypass of the signalling system are reported by Reuters for the first time. The CRS, which is India's rail safety authority, did not respond to a request for comment. This is what officials said likely happened at the crash site on June 2. "ERRATIC BARRIER" Indian Railways, the fourth largest train network in the world, is a state monopoly run by the Railway Board. The board reports to the Railways Min...

Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages. 39 6 Phase Sequence Like the selection of left- and right-turn phasing mode, the sequence of phases at an intersection can have impacts on safety and traffic operations. Phase sequence decisions are often closely related to the left- turn phasing mode. 6.1 Common Phase Sequences Phase sequence typically applies to pairs of opposing approaches at an intersection. For example, a certain phase sequence applies to the north and south approaches at an intersection. The same, or a different, phase sequence could be selected for the east and west approaches. Where permissive left-turn phasing mode is used on both opposing approaches, phase sequence is not an issue, because both approaches are served during a single phase. However, where protected left turns are used on either approach, either protected-only mode or protected-permissive mode, a choice must be made about the sequence of the phases. Following are commonly used phase sequences, shown in Figures 11-13: • Leading left-turn sequence, where protected left turns are served prior to the opposing through movement. In this sequence, left turns are considered to “lead” and through movements ...