Guidelines for Using Intelligent Warning Devices

1036675The purpose of this reference guide is to provide local agency staff a resource on four intelligent warning devices (active warning signs) that includes a general explanation on the use of the sign and their effectiveness, recommended installation protocols, alternative countermeasures to consider and maintenance considerations. With this guide, agency staff can identify whether implementation is warranted and further provide sourced responses to citizen\u2019s requests for them. The four intelligent warning devices covered in this reference guide includes: \u2022 LED Enabled Signs, \u2022 Radar Speed Feedback Signs, \u2022 Rectangular Rapid Flashing Beacons, and \u2022 Dynamic \u201cNo Turn on Red\u201d Signs. Nevertheless, the information provided must be used with engineering judgement. Due to the differences between urban vs. rural environments, city vs. county agencies and staff availability, there is no one size fits all approach. This document provides general guidance that should be modified to meet each agency\u2019s needs

Best Practices for Improving Subgrade Drainage

This project developed a high-level best practices guidance document for the design/installation of subsurface drainage. This Tool serves as a guide to assist agencies in understanding drainage problems and options to consider for mitigating structural damage to pavements due to moisture. The weather and soil conditions vary drastically across Minnesota. Engineers should use their engineering judgment and seek expert guidance when necessary

Asphalt Crack Treatment FAQs and Technical Resources

Crack treatment is one of the most used pavement preservation practices and although the technique is simple, there are several nuances that make it more of an art than science. The purpose of this document is to provide: \u2022 An overview of crack treatment, \u2022 Guidance on several FAQs, and \u2022 A high-level summary of several technical resources. Crack sealing is an important preventive treatment in a pavement preservation program to extend a pavement\u2019s serviceable life. Many factors go into determining \u201cif\u201d and \u201chow to\u201d best implement a crack treatment program. The following information is a compilation of synthesizing several technical documents and interviews with some local technical/industry representatives. Although much of this information is research based, some is anecdotal and/or advice from experienced practitioners. The intent is to provide an overview so agencies can draw their own conclusions on how to best implement a crack treatment program

Pavement Marking Decision Tree \u2013 Project Level: For a New Surface or Replacing Existing Markings with a Different Material

This Tool serves as a guide to assist agencies in understanding their options and determining which pavement marking material may be considered for a new surface or when replacing existing markings with a different material. That said, no one size fits all. Engineers should use their engineering judgment and seek expert advice when necessary

Stabilized Full Depth Reclamation (SFDR) \u2013 Evaluation of Two Stabilization Products: BASE ONE\uae and Engineered Emulsion

(c)1047211In previous Local Road Research Board (LRRB) studies there has been discussion but no empirical data regarding proprietary stabilizers. The LRRB leveraged an existing rehabilitation project on the border of Beltrami and Hubbard Counties to gather data and report on two stabilizers: engineered emulsion (used on the Beltrami County portion) and BASE ONE\uae (used on the Hubbard County portion). The county projects were Beltrami County: CSAH 4 and Hubbard County: CSAH 46. The purpose of this study was to document as-builts/road history; collect and report pavement condition; document stabilized full depth reclamation (SFDR) rehabilitations (and mix designs); interview contractor(s) and stakeholders; conduct sampling/testing (dynamic cone penetrometer, coring, and falling weight reflectometer testing); conduct performance analysis; and write a summary report