Traffic Signal Preemption at Intersections Near Highway–Rail Grade Crossings (2017) / Chapter Skim
Currently Skimming:
Pages 13-15
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 13... ...
13 chapter three RAIL SYSTEMS The primary pieces of the railway system (see Figure 3) are the detection system (i.e., track circuits)
|
From page 14... ...
14 railway may add five seconds of BT to assure the 20 seconds is generally met. This means that under typical field conditions, a train may be moving at a constant speed and the highway agency may observe that it takes the train 25 seconds to reach the crossing after preemption activates instead of the designed 20 seconds of warning time.
|
From page 15... ...
15 The APT is provided to the traffic signal before the railway warning system is activated, so that the traffic signal system can begin an immediate preemption to clear vehicles off the track(s) (described in more detail in chapter four)
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.