SVS External Interfaces | Roadsys, Inc

TRB Operations & Traffic Management

Bridging Transportation Researchers Conference

Sponsored by The University of Texas at Austin Cockrell School of Engineering, ARRB, COTA, UNSW Sydney, and the Research Centre for Integrated Transport Innovation, the Bridging Transportation Researchers (BTR) Conference will be held on August 9-10, 2023 online. TRB is pleased to cosponsor this event. The event is open to the public and there is no registration fee. This free conference will be hosted on multiple Zoom-based tracks to virtually and globally unite transportation engineers, planners, and p [...]

Airfield Design for Large Unmanned Aircraft Systems—A Guide

Developments in unmanned aircraft systems (UAS) technology and the seemingly endless applications of this technology offer society a broad spectrum of enhancements and solutions to many problems. The TRB Airport Cooperative Research Program's ACRP Research Report 238: Airfield Design for Large Unmanned Aircraft Systems—A Guide provides a fundamental understanding of large UAS (L-UAS) and their typical supporting infrastructure needs, which will assist airport sponsors with determining potential enha [...]

Development of a Small Aircraft Runway Length Analysis Tool

An important operational characteristic of an airport is the length of its longest runway. The longest runway determines the types of aircraft that can use the airport and dictates the operational limitations at the airport. The TRB Airport Cooperative Research Program's ACRP Web-Only Document 54: Development of a Small Aircraft Runway Length Analysis Tool provides a user-friendly computer tool to help airport planners and designers estimate runway length requirements for a variety of aircraft and design [...]

Dynamic Curbside Management: Keeping Pace with New and Emerging Mobility and Technology in the Public Right-of-Way, Part 1: Dynamic Curbside Management Guide and Part 2: Conduct of Research Report

Dynamic curbside management has been the purview of cities, with much of the relevant research and guidance directed toward local transportation agencies. However, state departments of transportation, metropolitan planning organizations, and other regional agencies can be important partners for these local entities because, in many cases, roadways and other curb zone elements are part of the regional or state network. The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 340: Dy [...]

6th International Symposium on Highway Geometric Design*

Arcadis and Association Infra Design are hosting the 6th International Symposium on Highway Geometric Design (ISHGD) on June 26-29, 2022 in Amsterdam, the Netherlands. TRB is pleased to cosponsor this event. The symposium consists of informative podium sessions on geometric design issues from throughout the world. Registration is open . [...]

Climate Change Challenges International Transportation Webinars

China Highway & Transportation Society is hosting a series of Climate Change Challenges International Transportation Webinars . TRB is pleased to cosponsor these events. Register for Webinar 2: Resilience of Urban Transportation Systems – Strength in Diversification. The urban transportation network is an integrated network in which multiple transportation modes are intertwined. Presenters will decouple the resilience relationship between the multi-layer cyber-physical networks of urban transportatio [...]

A Retroreflective Road Lane Marking Tape 1,000X Brighter than Existing Technology

Approximately 1,282 fatalities on U.S. interstate highways in 2020 were due to nighttime road departures. A new ultra-bright retroreflective lane marking tape can save lives as well as offer both a very short payback period and a very substantial benefit/cost ratio over its useful lifetime. The TRB IDEA (Innovations Deserving Exploratory Analysis) Program's NCHRP IDEA Final Report for Project 228: A Retroreflective Road Lane Marking Tape 1,000X Brighter than Existing Technology details a new product whic [...]

The University of Tennessee, Knoxville is hosting Summerrail 2022 on August 16-18, 2022 in Michigan City, IN. TRB is pleased to cosponsor this event. This conference brings together rail researcher and practitioners to discuss the latest issues in railroad engineering, equipment, operations and marketing with a particular emphasis on attracting students. Contact forrestvs@charter.net for registration information. [...]

SVS External Interfaces

The Relay Interface (SVS-RI) connects to the RS-232 port on each SVS-1 Processor DSP board using an RJ-45 to RJ-45 serial cable.

The function of the Relay Interface is to acquire the bit-serial relay message stream from the SVS-1 and convert the message to physical opto-coupled relay signals. High intensity LED's indicate true presence in the each zone. These signals are open collector vehicle presence signals and are brought out on individual conductors or on a card edge connector.
Relay Interface – T170/TS1/TS2 Cardfile

A jumper routing matrix allows any of the vehicle presence relays to be routed to any of the 4 card-edge relay contacts. Routing of additional relays is via a ribbon cable to optional daughter cards (SAS-RLY-332-01) in adjacent slots. Dual RJ-45 ports allow "daisy chaining" of multiple Relay Interfaces.

Features and Specifications

– Dual RS-232 Ports (RJ-45) for communication with the SVS-1
– Up to 10 Relays with High Intensity LED Indicators on front panel
– 22 position card edge or terminal block connector for shelf mount
– Shock NEMA TS2, Vibration NEMA TS2
– Operating Temperature -30 C to 75 C
– Power: 12 to 24 VDC
– Type 170/TS1/TS2 version Dimensions 4 1/2"x 7 1/2" x 1 1/16"
– Shelf Mount version Dimensions 5 1/2" x 1 1/2" x 5 9/16"

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