Connected VehicleWork Zone

Peer Exchange Demonstration

Maricopa County Department of Transportation

July 10, 2019

2

Background

Project Sponsored by the Federal Motor Carrier Safety Administration (FMCSA)

Innovative Technology Program

Arizona Department of Transportation

Maricopa County Department of Transportation

Goals

1. Improve safety in work zones on freeway and freight corridors

2. Improve traffic flow and reduce congestion on freeways and freight corridors due to work zones

Objectives

1. Develop and demonstrate a Work Zone warning and alert system using connected vehicle technologies (5.9 GZ DSRC communications) to provide in-vehicle information for commercial vehicle operators.

2. Develop and demonstrate the use of connected vehicle systems, including variable speed limits, queue warning, lane closure warning, and vehicle-to-vehicle messages to augment the operation of core CVISN capabilities (e.g. electronic credentialing and enforcement).

Connected Vehicle Infrastructure Equipment

Road Side Unit (RSU)

SAE J2735 Message SetSAE J2945/0 Minimum Performance

Requirements

Connected Vehicles

Technology, Equipment and Standards

5.9 GHz DSRC WirelessIEEE 1609

DSRC Roadside Unit (RSU) Specifications

Document v4.1(USDOT October 31, 2016)

Ethernet IEEE802.3

NTCIP 1202, 1211 Messages

Concept for the Proposed SystemAware Alert WarnInform

In-Vehicle Systems

In-Vehicle

Display

Vehicle

Processor

RSU RSU

Event or Incident Location

Fleet Management System

Routing/Dispatching

OBU Infrastructure Transportation

Management System

RSA Message

CVISN Enforcement Systems

AWARE

Driver is notified of a work zone in the roadway

Information aboutLane Closures

Workers Present

Speed Limit

Connected Vehicle System Components

MAP

TIM – Traveler Information Message

RSA – Roadside Alert Message

Roadside Safety Message (RSM)

Basic MAP

HMI Concept Drivewyze Concept

Work Zone Ahead30 mph

ALERTDriver can be alerted to hazardous conditions

Based on Traffic Data and Vehicle Decisions

• Alert Conditions

• Lane Closure

• Workers Present

• Speed Warning (exceeding speed)

Host Vehicle

Host VehicleHost Vehicle

Warn:Vehicle

Entering Roadway

ALERT – Construction Vehicle Entering

Roadway - Ahead

WARN

V2V Events (TBD)

Construction Vehicle Entering Roadway

Vehicle Based Warning

A vehicle in the work zone has a heading that intersects the current lane and is in the Drive gear

Warn:Vehicle Entering Roadway

ALERT – Construction Vehicle Entering

Roadway - Ahead

Connected Work Zone

Software Toolchain

The CAMP RSZ Map Tool

8

Work Flow and Current Progress

Niraj Vasant Altekar

04/15/2019

9

Work Flow (2)

10

Work Zone Configuration

11

Two Delivery Mechanisms: HMI and JSONInterface

Warn:Vehicle Entering Roadway

ALERT – Construction Vehicle Entering Roadway - Ahead

12

Experience and Lessons

Work Zones are VERY COMPLEX Geometries

Discussions with CAMP about modeling – with consideration for Freight Vehicles

Lane Add and Drop, Narrow Lanes, Lane Change Restrictions

Geometries change (that’s the point)

AZ511 and other systems note the locations – not the geometries

DON’T DISTRACT THE DRIVER

New Technologies are Challenging – but Improving