Minnesota Local Road Research Board

Multi-lane roundabouts can be an effective intersection control and reduce injury crashes if the design and layout is carefully considered. Past experience has indicated that failure to yield and improper lane use violations can be over represented at multi-lane roundabouts, leading to a higher number of property damage crashes. Two LRRB funded studies have recently been conducted to attempt to address these violations. This document is a summary of findings from these studies and local agency experience to date.

This Implementation Summary pertains to 2016RIC11, Snow & Ice Control Guidebook.

This Snow and Ice Control Guidebook summarizes common snow and ice control tools and serves as an introduction to the field of winter maintenance for operators and managers. Minnesota local agencies perform winter maintenance to keep roads clear for the traveling public. However, agencies must balance public safety, cost, and environmental concerns to effectively manage their winter maintenance policy. Minnesota cities and counties should retain an up-to-date policy for winter maintenance that specifies desired pavement conditions.

The strategies in this guide are possible methods to minimize the system preservation financial gap identified for our system. Some of these strategies will have a direct effect on the “gap” and some will indirectly affect preservation needs. These strategies have been classified into four general categories: System adjustments, Operations and maintenance, Planning and capital and Revenue entrancements.

This Resource Guide is an updated version of Chapter 3 from 2016-34A. In order to successfully maintain and manage the County’s roadway system, county engineers need to be aware of the myriad of decision-making resources available, and how to apply these resources to maximize returns on their investment. Numerous tools and resources exist to aid local agencies in managing their roadways. While some are very well known and widely used, others have not been implemented or are not being used to their full potential. The objective of this chapter is to present a compilation of key decision-making tools that can assist practitioners to make the best decisions possible concerning the maintenance of their transportation network. The following 11 methods, tools, database, etc., were identified as effective resources by the pilot county engineers: • Falling Weight Deflectometer (FWD) Data • Pavement Condition Data • MnDOT Pathway Services Pathweb Viewer Application (Pathweb) • Pavement (or Asset) Management System • Traffic Data and Forecasting • MnDOT Needs Database/Spreadsheets • Geographical Information Systems (GIS): Base Maps and Data Sets • Minnesota Crash Mapping Analysis Tool 2 (MnCMAT2) • Transportation Plans • Upper Great Plains Transportation Institute (UPGTI) Geographic Roadway Inventory Tool (GRIT) • Best Practices: Managing Interaction between Local Authorities and Major Traffic Generators • Summary NOTE: A spreadsheet tool is available as an Excel macro file and may be accessed from https://edocs-public.dot.state.mn.us/edocs_public/DMResultSet/download?docId=29248580

What Was the Need? The Temporary Traffic Control Zone Layouts Field Manual is a valuable tool that MnDOT offers to help improve work zone safety for both workers and drivers. The field manual describes appropriate work zone layouts, including the safety devices that are needed, for a wide range of work zones. Users of the manual decide which layout is appropriate for a given situation depending on a variety of factors, including number of lanes, the duration of the work zone, the location of the work, or features such as intersections and grade crossings.

The intent of this document is to help local agencies identify the appropriate work zone layout based on the maintenance activity that will be performed. This document is intended to be used as supplemental guidance to the Temporary Traffic Control Zone Layouts Field Manual (dated January 2014). The information presented here does not replace or override anything within the fi eld manual. Agencies must follow the standards and guidance contained in the Minnesota Manual on Uniform Traffi c Control Devices (MN MUTCD), including the Field Manual.

This Implementation Summary pertains to report 2016RIC10, Intersection Safety Technologies Guidebook.

A brief FAQ sheet regarding the use of Full Depth Reclamation (FDR) in urban settings.