Optimal Detector Location for Bus Signal Priority

2004 ◽  
Vol 1867 (1) ◽  
pp. 144-150 ◽  
Author(s):  
Hongchao Liu ◽  
Alexander Skabardonis ◽  
Wei-bin Zhang ◽  
Meng Li
Keyword(s):  
Optimal Detector ◽  
Bus Signal Priority ◽  
Detector Location

Performance of Transit Signal Priority with Queue Jumper Lanes

2005 ◽  
Vol 1925 (1) ◽  
pp. 265-271 ◽  
Author(s):  
Guangwei Zhou ◽  
Albert Gan
Keyword(s):  
Transit Signal Priority ◽  
Preferential Treatment ◽  
Local Conditions ◽  
Bus Stop ◽  
Optimal Detector ◽  
Bus Delay ◽  
Traffic Volumes ◽  
Bus Stops ◽  
Detector Location

Queue jumper lanes are a special type of bus preferential treatment that allows buses to bypass a waiting queue through a right-turn bay and then cut out in front of the queue by getting an early green signal. The performance of queue jumper lanes is evaluated under different transit signal priority (TSP) strategies, traffic volumes, bus volumes, dwell times, and bus stop and detector locations. Four TSP strategies are considered: green extension, red truncation, phase skip, and phase insertion. It was found that queue jumper lanes without TSP were ineffective in reducing bus delay. Queue jumper lanes with TSP strategies that include a phase insertion were found to be more effective in reducing bus delay while also improving general vehicle operations than those strategies that do not include this treatment. Nearside bus stops upstream of check-in detectors were preferred for jumper TSP over farside bus stops and nearside bus stops downstream of check-in detectors. Through vehicles on the bus approach were found to have only a slight impact on bus delay when the volume-to-capacity (v/c) ratio was below 0.9. However, when v/c exceeded 0.9, bus delay increased quickly. Right-turn volumes were found to have an insignificant impact on average bus delay, and an optimal detector location that minimizes bus delay under local conditions was shown to exist.

Bus signal priority based on SCOOT

2017 ◽  
Author(s):  
Bo Zhang ◽  
Qing Wang ◽  
Fen Liu ◽  
Lu Kang
Keyword(s):  
Bus Signal Priority

Studies on the Technology and Application of Transit Signal Priority on Exclusive Line

2015 ◽  
Vol 743 ◽  
pp. 774-779
Author(s):  
Q.L. Wang
Keyword(s):  
Stopping Times ◽  
Signal Control ◽  
Traffic Signal Control ◽  
Transit Signal Priority ◽  
Bus Priority ◽  
Average Delay ◽  
Average Speed ◽  
Traffic Jam ◽  
Bus Signal Priority ◽  
Key Features

Bus priority is the effective methods of reducing traffic jam in large and medium-sized cities. Application and assessment of bus signal priority is studied, bus signal priority whole scheme is put forward based on GPS pointing and intelligent dispatch by investigating the situation of No.36 bus waiting time at stops and intersections. Based on Zigbee active request bus signal priority, dataflow process under local request and central request is analyzed, the principle of bus signal priority on balanced distance headway is put forward, and adjustment of key features parameters realized combining with SCATS traffic signal control system. The application assessment shows that, there are average 651 priority requests and 286 priority buses every day, priority efficiency is 43.9%.The average speed of No.36 bus increased 15.8%, the delay time reduced 13.2%, the stopping times reduced 27%, the twice stop situation at intersections basically disappeared, average delay at each intersection increased 3%.

Optimal Sequential Detection of Stimuli from Multiunit Recordings Taken in Densely Populated Brain Regions

2012 ◽  
Vol 24 (4) ◽  
pp. 895-938 ◽  
Author(s):  
Nir Nossenson ◽  
Hagit Messer
Keyword(s):  
Order Statistics ◽  
Single Neuron ◽  
Brain Regions ◽  
Second Order ◽  
Detection Scheme ◽  
Second Order Statistics ◽  
Optimal Detector ◽  
Electrode Voltage ◽  
The Subject ◽  
High Pass

We address the problem of detecting the presence of a recurring stimulus by monitoring the voltage on a multiunit electrode located in a brain region densely populated by stimulus reactive neurons. Published experimental results suggest that under these conditions, when a stimulus is present, the measurements are gaussian with typical second-order statistics. In this letter we systematically derive a generic, optimal detector for the presence of a stimulus in these conditions and describe its implementation. The optimality of the proposed detector is in the sense that it maximizes the life span (or time to injury) of the subject. In addition, we construct a model for the acquired multiunit signal drawing on basic assumptions regarding the nature of a single neuron, which explains the second-order statistics of the raw electrode voltage measurements that are high-pass-filtered above 300 Hz. The operation of the optimal detector and that of a simpler suboptimal detection scheme is demonstrated by simulations and on real electrophysiological data.

Sign in / Sign up

Export Citation Format

Share Document