Cooperative Intelligent Transport Systems: 5.9-GHz Field Trials

Alexander, P.D.; Haley, David; Grant, Alex

doi:10.1109/jproc.2011.2105230

Cited by 181 publications

(107 citation statements)

References 35 publications

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“…However, as reported in Alexander et al (2011), the Cohda Wireless OBUs routinely establish reliable radio connection at longer ranges than this. When running the experiments we noticed that in some scenarios the threat detection engine went immediately into level 2 or 3 warning.…”

Section: Discussionmentioning

confidence: 93%

“…Real-world, scenario- based radio system performance results have been previously reported by Alexander et al (2011). Other than replacing the GPS signal with the simulated trajectories, the onboard units functioned as they would in a typical installation, employing industry standard communications protocols and messaging formats.…”

Section: Discussionmentioning

confidence: 99%

“…No attempt was made to simulate the actual physical radio environment from the crash scene, and the units were connected with an RF cable. Previous extensive on-road testing of the radio system performance of these OBUs was reported by Alexander et al (2011).…”

Section: Methodsmentioning

confidence: 99%

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The Real-World Safety Potential of Connected Vehicle Technology

Doecke

Grant²,

Anderson

2015

Traffic Injury Prevention

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Objective: This article estimates the safety potential of a current commercially available connected vehicle technology in real-world crashes.Method: Data from the Centre for Automotive Safety Research's at-scene in-depth crash investigations in South Australia were used to simulate the circumstances of real-world crashes. A total of 89 crashes were selected for inclusion in the study. The crashes were selected as representative of the most prevalent crash types for injury or fatal crashes and had potential to be mitigated by connected vehicle technology. The trajectory, speeds, braking, and impact configuration of the selected in-depth cases were replicated in a software package and converted to a file format allowing "replay" of the scenario in real time as input to 2 Cohda Wireless MK2 onboard units. The Cohda Wireless onboard units are a mature connected vehicle technology that has been used in both the German simTD field trial and the U.S. Department of Transport's Safety Pilot project and have been tuned for low false alarm rates when used in the real world. The crash replay was achieved by replacing each of the onboard unit Global Positioning System (GPS) inputs with the simulated data of each of the involved vehicles. The time at which the Cohda Wireless threat detection software issued an elevated warning was used to calculate a new impact speed using 3 different reaction scenarios and 2 levels of braking.Results: It was found that between 37 and 86% of the simulated crashes could be avoided, with highest percentage due a fully autonomous system braking at 0.7 g. The same system also reduced the impact speed relative to the actual crash in all cases. Even when a human reaction time of 1.2 s and moderate braking of 0.4 g was assumed, the impact speed was reduced in 78% of the crashes. Crash types that proved difficult for the threat detection engine were head-on crashes where the approach angle was low and right turn-opposite crashes.Conclusions: These results indicate that connected vehicle technology can be greatly beneficial in real-world crash scenarios and that this benefit would be maximized by having the vehicle intervene autonomously with heavy braking. The crash types that proved difficult for the connected vehicle technology could be better addressed if controller area network (CAN) information is available, such as steering wheel angle, so that driver intent can be inferred sooner. More accurate positioning in the real world (e.g., combining satellite positioning and accelerometer data) would allow the technology to be more effective for near-collinear head-on and rear-end crashes, because the low approach angles that are common in such crashes are currently ignored in order to minimize false alarms due to positioning uncertainty.

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Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

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The Real-World Safety Potential of Connected Vehicle Technology

Doecke

Grant²,

Anderson

2015

Traffic Injury Prevention

Self Cite

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“…Some large consortium projects such as: Connected Vehicles, Cooperative VehicleInfrastructure Systems, Cooperative Systems for Road Safety, Strategic Platform for Intelligent Traffic Systems, Car-2-Car, etc. [2,37], have shown the feasibility and advantages of DSRC (Dedicated Short Range Communications) technology, which is particularly important for smooth vehicular communication. It enables safety and infotainment applications by IEEE 802.11p standard in 5.850 GHz to 5.925 GHz, which allows the devices to transmit up to 1 km with 32 dBm power [38].…”

Section: The Vehicular Communication Safety System / Sigurnosni Sustamentioning

confidence: 99%

ICT sustavi za poboljšanje sigurnosti na radu u okviru morskih luka

Bauk¹

2018

Naše more

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SummaryThe paper presents some commercial ICT (Information and Communication Technology) solutions for increasing workers' safety in invasive environments (e.g., steel industry, mining, construction, oil and gas rigs, seaports, etc.). It has been pointed to the need to increase safety measures, primarily because of the necessity to protect human lives and health, as well as to increase productivity and reduce the costs, which companies and insurance agencies have to cover in the case of accidents. The article also briefly describes some alternative solutions that have been examined at the level of simulations, in accordance to the actual needs and available resources at the Port of Bar (South Adriatic Sea). This seaport has been operating during the decades in the transitional conditions and it has been permanently faced with the impediments in providing sophisticated and expensive ICT solutions for occupational safety purposes. SažetakU radu su prikazana komercijalna ICT (informacijske i komunikacijske tehnologije) rješenja za poboljšanje sigurnosti na radu u invazivnom radnom okruženju (npr. industrija čelika, rudnici, gradilišta, naftne i plinske platforme, morske luke, itd.). Pokazuje se potreba poboljšanja sigurnosnih mjera, ponajprije zbog zaštite ljudskih života i zdravlja, kao i zbog povećanja produktivnosti i smanjenja troškova koje kompanije i osiguravateljske kuće moraju pokriti u slučaju nezgoda. U članku se također ukratko opisuju alternativna rješenja koja su ispitana na razini simulacija u skladu sa stvarnim potrebama i raspoloživim resursima u Luci Bar (južni Jadran). Ova morska luka djeluje desetljećima u uvjetima tranzicije i stalno je suočena s preprekama u pružanju sofisticiranih i skupih ICT rješenja za potrebe zaštite na radu. KEY

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“…A particular area of interest is efficient collision avoidance algorithms for traffic intersections [2], [3], [4]. In Europe, intersections-related accidents are responsible for 21 % of traffic related deaths and 43 % of the non-fatal injuries [5].…”

Section: Introductionmentioning

confidence: 99%

Convex modeling of conflict resolution at traffic intersections

Murgovski

Campos

Sjöberg

2015

2015 54th IEEE Conference on Decision and Control (CDC)

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Abstract-We study the problem of optimally controlling autonomous vehicles to safely cross an intersection. The problem is approached by solving an optimal control subproblem for all permutations of crossing sequences. For a chosen crossing sequence, we show that the subproblem of optimal longitudinal vehicle control, subject to collision avoidance constraints, can be formulated as a convex program. The proposed method transforms the problem from the original time domain to a space domain, and introduces a change of optimization variables by replacing vehicles' speed with its inverse. A case study is provided showing the effectiveness of the proposed method.

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Cooperative Intelligent Transport Systems: 5.9-GHz Field Trials

Cited by 181 publications

References 35 publications

The Real-World Safety Potential of Connected Vehicle Technology

The Real-World Safety Potential of Connected Vehicle Technology

ICT sustavi za poboljšanje sigurnosti na radu u okviru morskih luka

Convex modeling of conflict resolution at traffic intersections

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