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New on-line simulation tool developed by ATTAP -
2013-01-10 / 15:48:58
UMDTEST (Universal Modular Distributed Traffic Extendable Simulation Toolkit) , a web-based modular traffic simulation platform has been developed by ATTAP. Currently, it can employ either of two simulation engines: (1) a vehicular evacuation simulation and optimization engine based on research by Xin Zhang and (2) a freeway macro-particle simulation model (MPSM)
ESSIM (Eastern Shore Simulator), a web-based evacuation simulator for Ocean City and the Eastern Shore region has been developed using the UMDTEST framework. The demo is currently available at the oceancity.umd.edu website
6 new papers have been completed for 92th TRB annual meeting in 2013 by ATTAP members -
2012-11-21 / 9:29:30
1. Transit Priority Strategies for Multiple Routes under Headway-based Operations
Yongjie Lin, Xianfeng Yang, Gang-Len Chang, Nan Zou
2. Development of Planning Framework for the Geometry Design of Continuous Flow Intersections
Xianfeng Yang, Gang-Len Chang, Yang Lu, Saed Rahwanji
3. Proactive Optimal Variable Speed Limit Control for Recurrently Congested Freeway Bottlenecks
Xianfeng Yang, Yang (Carl) Lu, Gang-Len Chang
4. A Multi-stage System for Planning Analysis and Signal Design of Diverging Diamond Interchange
Xianfeng Yang, Gang-Len Chang, Saed Rahwanji
5. Design and Evaluation of Operational Strategies for Deploying Emergency Response Teams in a Commuting Corridor: A Case Study of the Capital Beltway
Shanjiang Zhu, Woon Kim, Gang-Len Chang, Steve Rochon
6. ITS APPLICATION: DESIGN AND EVALUATION OF AN INTELLIGENT DILEMMA
ZONE PROTECTION SYSTEM FOR A HIGH SPEED RURAL INTERSECTION
Gang-Len Chang, Mark L. Franz, Yue Liu, Yang (Carl) Lu, Ruihua Tao
A Success research accomplishment for the Applied Technology and Traffic Analysis Program (ATTAP) led by Professor Chang -
2012-11-01 / 17:47:54
The high speed, isolated rural intersection of US 40 and Red Toad Road, in Cecil County, MD had experienced 89 crashes between 2000-2010, with 45% of those crashes were potentially related to dilemma zones (a term used to describe the situation when a motorist can neither stop nor clear intersection at during the yellow interval). To address this issue, the Applied Technology and Traffic Analysis Program (ATTAP) in collaboration with the Maryland State Highway Administration (MD SHA) designed and installed a state-of the-art dynamic dilemma zone protection system at this intersection.
The system incorporates a microwave sensor that continuously tracks vehicles as they approach the intersection. This tracking feature allows the system to estimate if a vehicle can clear the intersection before the side street traffic is released. For those vehicles that need extra time to clear the intersection, an all-red extension interval is call, thus holding the side street traffic for up to 2.5 additional seconds to allow approaching vehicle(s) to safely cross the intersection. Since the system was installed and activated in late 2011, no crashes related to dilemma zones have been reported. The success of this system has peaked the interest of Maryland SHA officials who has asked the research team to design and deploy similar dilemma zone protection systems for more high speed rural intersections. The system is in the process for applying the US patent.
Eastern shore regional traffic monitoring and management system project update -
2012-09-25 / 10:25:57
Eastern shore regional traffic monitoring and management system presentation file is available.
Xiin Zhang’s Graduation -
2012-09-25 / 10:21:40
Xin Zhang finished his Ph.D. thesis defense. The thesis title is "Development of a Mixed-flow Optimization System for Emergency Evacuation Networks".
for thesis defense presentation
Dynamic Dilemma Zone Protection System -
2012-02-27 / 16:19:19
The Dynamic Dilemma Zone Protection has been successfully implemented and demonstrated its effectiveness in preventing accidents.
for presentation file and video file
ATTAP made a presentation on Maryland Unconventional Intersection Design (MUID) in MDQI (Maryland Quality Initiative) meeting on Feb 2nd 2012 at Baltimore. MDQI is a cooperati -
2012-02-27 / 16:16:53
ATTAP made a presentation on Maryland Unconventional Intersection Design (MUID) in MDQI (Maryland Quality Initiative) meeting on Feb 2nd 2012 at Baltimore. MDQI is a cooperative effort by Maryland's transportation industry dedicated to the continuous quality improvement in the planning, design, construction, and maintenance of Maryland's transportation system.
for MUID by ATTAP
for Field Evaluation of Double Crossover Diamond Interchange (DDI) by Wei Zhang (FHWA)
for MD 85 at I 270 Interchange: Evolving from Conventional to Hybrid Unconventional Configuration Avijit Maji (MDSHA)
A workshop for the Maryland Capacity Analysis Program (MDCAP) and the Maryland Unconventional Intersection Design Program (MUID) -
2012-02-27 / 15:19:26
A workshop for the Maryland Capacity Analysis Program (MDCAP) and the Maryland Unconventional Intersection Design program (MUID) was hosted by ATTAP on November 17th 2011 at University of Maryland, with over 20 officials from MD SHA in attendance.
3 new sensors have been deployed in the Eastern Shore Region. -
2012-02-27 / 15:14:44
3 new sensors (Sensor 201, 202, and 203) have been deployed in the Eastern Shore Region.
Computer simulation based Baltimore Evacuation System, developed by ATTAP members, has been applied to evaluate the traffic impact study during Grand Prix (September 2-4 2011) -
2012-02-27 / 15:11:54
> Computer simulation based Baltimore Evacuation System, developed by ATTAP members, has been applied to evaluate the traffic impact study during Grand Prix (September 2-4 2011) in Baltimore City for traffic management plan.
for more information.
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