Crash Risk and Access Spacing on Two-Lane and Multi-Lane Highways

Hitesh Chawla; Peter T. Savolainen, Ph.D., P.E.

INTRODUCTION

Effective access management is essential to mitigating traffic crash risks. Most of the crashes occurring near access points are a result of conflicts between multiple vehicles. This motivates the development of guidelines for access spacing. To this end, this study evaluated the relationship between crash risk and access point spacing on two-lane and multi-lane highways across the state of Iowa.

Interchange Deceleration Lane Design Based on Naturalistic Driving Speed and Deceleration Rates

Dan Xu (1st Place Poster Award Winner) and Chennan Xue

(Poster updated 8/1/2018)

The Green Book provides the minimum lengths of deceleration lanes. The length recommendations provided by the 2011 edition are similar to the documents published in 1965, which were based on the data collected in the 1930s and had not been updated. (Fitzpatrick et al., 2012; Abdelnaby, 2014) Data was obtained from NDS dataset, including Video and Time Series Report.

A Probabilistic Model to Predict Intermittent Sight Distance Obstruction at Unsignalized Intersections on High-Speed Rural Divided Highways

Chennan Xue and Dan Xu

Minor-road left-turn vehicles’ views are likely to be blocked by major-road right-turn vehicles on the conventional right-turn lane at unsignalized intersections.

Conclusions

Congratulations to our 2018 Student Poster Winners!

First Place went to Dan Xu (Auburn University)

2nd Place Tie to Rob Sanders (Brigham Young University)

2nd Place Tie to Md Atiquzzman (Auburn University)

Student Poster Participants:

Video-Sharing Procedure for Access Management Professionals 

NEW! NCHRP Research Report 875: Guidance for Evaluating the Safety Impacts of Intersection Sight Distance is a resource for practitioners involved in the planning, design, operations, and traffic safety management of stop-controlled intersections. It provides information on how to estimate the effect of intersection sight distance (ISD) on crash frequency at intersections and describes data collection methods and analysis steps for making safety informed decisions about ISD.

We are happy to announce that – for the first time ever – sponsorship of the National Access Management Conference is available. These sponsorships help support the work of this committee to spread the word about how access management improves our transportation system by saving lives and improving mobility.

Quite a variety and levels of sponsorship are available, as indicated in the sponsorship form.  

You can help support the National Access Management Conference as a

 TRB's newest publications on access management draw on national and state research to respond to the need for a more coordinated approach to transportation and community design that preserves the safe and efficient movement of peoples and goods, provides supporting networks in developed areas, and reinforces desired urban form.

Designing Walkable Urban Thoroughfares: A Context Sensitive Approach

An ITE Recommended Practice

Objectives of this Report

The objectives of this report are to

This document is a technical summary of the Federal Highway Administration report,
Safety Evaluation of Access Management Policies and Techniques, FHWA-HRT-14-057.

INTRODUCTION

FDOT has the responsibility of maintaining the State’s roadway system. As a result, it is FDOT’s responsibility to monitor the traffic impacts of new development along the State Highway System. In response to the ever changing economic climate following the downturn of the economy, FDOT saw the need to assess the validity and applicability of trip generation and internal capture practices in Florida.

Mike on Traffic provides proven practioners tips to help professionals.

These checklists may be useful:

• Traffic Data Collection
• Document Existing Conditions
• Assumptions to Reviewers
• Prepare Traffic Forecasts
• Perform Capacity Analysis
• Determine Necessary Improvements
• Determine Whether to Use Simulation
• Site Review
• Prepare Documentation
• Preparing the Proposal
• Manage the Traffic Study
• Agency Review

Access Management (Driveways)

FHWA 4 page brochure 

Introduction

 Effective local access management requires planning as well as regulatory solutions. Communities should establish a policy framework that supports access management in the local comprehensive plan, prepare corridor or access management plans for specific problem areas, and encourage good site planning techniques. Land development and subdivision regulations should be amended accordingly and communities may also consider a separate access management ordinance.

This Handbook was prepared by FDOT District 1 

The Handbook is designed to generally follow the chronological order of process needed through the pre-application, application review, permit approval, and driveway construction processes.  

Chapters

CH1 Introduction

CH2 Pre-Application Procedures

CH3 Permit Submittal Requirements

CH4 Completeness & Technical Reviews

CH5 Notice of Intent

CH6 Permit Approval and Issuance

CH7 Construction Requirements

CH8 Violations

This very popular 12 page access management brochure provides answers to the following questions often asked by business owners:

Effects on Business Activity

This tri-fold brochure was produced by the Florida Department of Transportation and is printed in Spanish.

 ¿Por qué considerar el Manejo de Acceso?