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ISP-Vehicle Location Referencing Standard

Motor Vehicle Council
  • Ground Vehicle Standard
  • J1746_201910
  • Current
Published 2019-10-03 by SAE International in United States
This SAE Standard is intended to be used for the communication of spatial data references between central sites and mobile vehicles on roads. References can be communicated from central site to vehicles, or from vehicles to central sites. The document may also be used where appropriate by other ITS applications requiring location references between data sets.
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A Novel Metaheuristic for Adaptive Signal Timing Optimization Considering Emergency Vehicle Preemption and Tram Priority

SAE International Journal of Transportation Safety

Universite Mohammed V de Rabat Ecole Mohammadia d'Ingenieurs, Morocco-Maryam Alami Chentoufi, Rachid Ellaia
  • Journal Article
  • 09-07-02-0007
Published 2019-09-24 by SAE International in United States
In this article, a novel hybrid metaheuristic based on passing vehicle search (PVS) cultural algorithm (CA) is proposed. This contribution has a twofold aim: First is to present the new hybrid PVS-CA. Second is to prove the effectiveness of the proposed algorithm for adaptive signal timing optimization. For this, a system that can adapt efficiently to the real-time traffic situation based on priority signal control is developed. Hence, Transit Signal Priority (TSP) techniques have been used to adjust signal phasing in order to serve emergency vehicles (EVs) and manage the tram priority in a coordinated tram intersection. The system used in this study provides cyclic signal operation based on a real-time control approach, including an optimization process and a database to manage the sensor data from detectors for real-time predictions of EV and tram arrival time. Then, a simulation model is developed using Arena Simulation Software to evaluate best timing plans at the intersection.
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Connected & Autonomous Vehicles – Foundations and Business Models

  • Professional Development
  • C1951
Published 2019-09-11

The global forecasts of Connected and Autonomous Vehicles (CAV) uptake predicts a sustained market growth. Depending on the scenarios to take place the expansion in market share could be exponential.  Considering rapid technology development and moderate global L3-L5 CAV uptake, estimates a share of 25% of total annual global vehicle sales in 2035.

Taking a City’s Pulse with Moveable Sensors

  • Magazine Article
  • TBMG-35197
Published 2019-09-01 by Tech Briefs Media Group in United States

Suppose you have 10 taxis in Manhattan. What portion of the borough’s streets do they cover in a typical day?

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National Names Phrase List

V2X Core Technical Committee
  • Ground Vehicle Standard
  • J2540/3_201906
  • Current
Published 2019-06-11 by SAE International in United States
This SAE Standard provides a table of textual messages meeting the requirements for expressing the names of street and roads and some basic building blocks for phrases commonly used in the ITS industry. The tables provided herein are taken from SAE J2369, and follow the rules of SAE J2540 and therefore allow a local representation in various different languages, media expressions, etc. to allow true international use of these phrases. The phrases are predominantly intended to provide a means to express street names including pre and post fixes ( North Oak Street is an example name with a prefix “North” and main portion “Oak” and a suffix “Street”). Other phrases exist for other specific specialty areas of ITS, and all such phrases follow a set of encoding and decoding rules outlined in SAE J2540 to ensure that the use of these phrases in messages remain interoperable between disparate types of user equipment. Implementers are cautioned to obtain the most recent set of tables by means of the ITS data registry, a process which involves the…
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Message Sets for Advanced Traveler Information System (ATIS)

V2X Core Technical Committee
  • Ground Vehicle Standard
  • J2354_201906
  • Current
Published 2019-06-11 by SAE International in United States
This SAE Standard describes standardized medium-independent messages needed by information service providers for Advanced Traveler Information Systems (ATIS). The messages contained herein address all stages of travel (informational, pre-trip and en route), all types of travelers (drivers, passengers, personal devices, computers, other servers), all categories of information, and all platforms for delivery of information (in-vehicle, portable devices, kiosks, etc.).
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RDS Phrase Lists

V2X Core Technical Committee
  • Ground Vehicle Standard
  • J2540/1_201906
  • Current
Published 2019-06-11 by SAE International in United States
This SAE Standard provides a table of textual messages meeting the requirements for expressing “Radio Data Systems” (RDS) phrases commonly used in the ITS industry. They can be used both over the RDS subcarrier transmission media as part of a 37-bit long “Group 8a message” as well as being used to provide a common content list of phrases used in a wide number of other media and applications. This document SHALL define the normative index values to be used, extending the CEN established list to provide phrases needed by US practitioners. This standard provides non-normative textual phrases which MAY be used by implementers to ensure intelligible results. This document SHALL follow the formats and rules established in SAE J2540 in the expressions, manipulations, and use of such tables. It should be pointed out that within the rules established by this document a variety of final table are all considered “compliant” with the document, and may vary as fits the needs of implementers.
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Data Dictionary for Advanced Traveler Information Systems (ATIS)

V2X Core Technical Committee
  • Ground Vehicle Standard
  • J2353_201906
  • Current
Published 2019-06-11 by SAE International in United States
This SAE Recommended Practice provides a set of core data elements needed by information service providers for Advanced Traveler Information Systems (ATIS). The data dictionary herein provides the foundation for ATIS message sets for all stages of travel (pre-trip and en route), all types of travelers (drivers, passengers), all categories of information, and all platforms for delivery of information (in-vehicle, portable devices, kiosks, etc.). The elements of this document are the basis for the SAE ATIS Message Set Standard J2354 and are entered into the SAE Data Registry for ITS wide coordination.
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Location Referencing Message Specification (LRMS)

V2X Core Technical Committee
  • Ground Vehicle Standard
  • J2266_201906
  • Current
Published 2019-06-11 by SAE International in United States
The Location Referencing Message Specification (LRMS) standardizes location referencing for ITS applications that require the communication of spatial data references between databases. ITS databases may reside in central sites, vehicles, or devices on or off roads or other transportation links. The LRMS is applicable to both homogeneous (same database) and mixed database environments that may be implemented on wireless or landline networks. While developed for ITS applications, the LRMS may be used for non-ITS applications as well within the field of geographic information processing.
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A Non-Contact Overload Identification Method Based on Vehicle Dynamics

Suizhou-WUT Industry Research Institute-Gangfeng Tan
Wuhan University of Technology-Daolin Zhou, Yiran Ding, Shimin Yu, Xiaofei Ma, Shuai Wang, Zhenyu Wang
Published 2019-04-02 by SAE International in United States
The vehicle overload seriously jeopardizes traffic safety and affects traffic efficiency. At present, the static weighing station and weigh-in-motion station are both relatively fixed, so the detection efficiency is not high and the traffic efficiency is affected; the on-board dynamic weighing equipment is difficult to be popularized because of the problem of being deliberately damaged or not accepted by the purchaser. This paper proposes an efficient, accurate, non-contact vehicle overload identification method which can keep the road unimpeded. The method can detect the vehicle overload by the relative distance (as the characteristic distance) between the dynamic vehicle's marking line and the road surface. First, the dynamics model of the vehicle suspension is set up. Then, the dynamic characteristic distance of the traffic vehicle is detected from the image acquired by the calibrated camera based on computer vision and image recognition technology. The data error caused by the vehicle vibration can be reduced by the filter set up in this paper. Finally, the actual axle load of the vehicle can be obtained combined with the established…
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