Speed Limit Setting Handbook ^NEW

Engineering Speed Management Countermeasures: A Desktop Reference of Potential Effectiveness in Reducing Crashes November 2023 ^NEW

Guidance for the Setting of Speed Limits (Report to Congress) 

Safe System Approach for Speed Management 

Speed Safety Camera Program Planning and Operations Guide 

• Webinar Recording for Speed Safety Camera Program Planning and Operations Guide (passcode: r!^hp#9R) 

• Speed Safety Camera Frequently Asked Questions 

Speed Management Practices

Self-Enforcing Roadways: A Guidance Report

Speed Management ePrimer for Rural Transition Zones and Town Centers

Speed Management Outreach Materials

• Lower Citywide Speed Limits and Design Changes: Safer city arterials for all road users [PDF 1.34 MB]
• Speed Limit Basics [PDF, 1.25 MB]
• Speed Management Countermeasures: More than Just Speed Humps [PDF 1.37 MB]
• Speed Management Case Study: Georgia Department of Transportation Setting Speed Limits with Help from USLIMITS2 [PDF 1.01 MB]
• Speed Management Case Study: Reducing Excessive Speeding in Rural Communities in Iowa [PDF, 1.15 MB]
• Noteworthy Practice Booklet – Speed Management [PDF, 3.98MB]
  • Case Study 1: Strategic Speed Management Program – CITY OF AUSTIN, TEXAS, [PDF 824KB]
  • Case Study 2: Self-Enforcing Roadways – CITY OF GOLDEN, CO, [PDF 604KB]
  • Case Study 3: Setting Credible Speed Limits – NEW HAMPSHIRE DOT, [PDF 605KB]
  • Case Study 4: High Visibility Enforcement – CITY OF ORO VALLEY, ARIZONA, [PDF, 289KB]
  • Case Study 5: Successful Strategies for Adoption of Safety Cameras – NEW YORK CITY, NEW YORK, [PDF 534KB]
  • Case Study 6: Targeted Reporting of Speeding-Related Crashes – ARIZONA DOT, [PDF 470KB]
  • Case Study 7: Consistent Speed Limits for Vulnerable Road Users – Examples from Various Agencies, [PDF 1.97MB]
  • Case Study 8: Network Approach to Setting Speed Limits NEW ZEALAND TRANSPORT AGENCY, [PDF 315KB]

Integrating Speed Management within Roadway Departure, Intersections, and Pedestrian and Bicyclist Safety Focus Areas

Factors Influencing Operating Speeds and Safety on Rural and Suburban Roads.
This report documents the component factors affecting speed and safety on rural and suburban roadways that are not limited access. The report also describes the treatments that have the potential to reduce speed-related crashes. Finally, the research looked into the safety effects of lane-width-shoulder-width combinations on rural two-lane, two-way road segments.

Jurisdiction Speed Management Action Plan Development Package:

1. A Speed Management Action Plan Template (Template), developed to provide a model for State and local agencies to use in developing jurisdiction-specific speed management safety action plans
2. A Speed Management Toolkit document (Toolkit), which includes a comprehensive speed management bibliography, tables of speed management countermeasures with expected crash or speed effects; and tip sheets for communications programs
3. The City of Bellevue Speed Management Plan (Local Plan), an example of a local jurisdiction action plan ^NEW
4. The Speed Management Action Plan for Randolph County (Local Plan), an example of a local jurisdiction action plan
5. The Alabama Speed Management Action Plan (Statewide Plan), an example of a statewide action plan
6. SPEED MANAGEMENT ACTION PLAN – Implementation Steps
7. SPEED MANAGEMENT – A Systemic Safety Approach
8. Speed Management Action Plan – Oregon Department of Transportation
9. SPEED MANAGEMENT ACTION PLAN – Implementation: Partnerships Help North Carolina Manage Speed
10. SPEED MANAGEMENT ACTION PLAN – Development: Developing a Speed Management Action Plan Piece by Piece
11. SPEED MANAGEMENT ACTION PLAN – Implementation: The Oregon Experience

Evaluation of Dynamic Speed Feedback Signs on Curves: A National Demonstration Project
This report discusses treatments that can potentially reduce speeds and speeding-related crash risks on rural horizontal curves. This report describes the effectiveness of dynamic signs that alert drivers to changes in roadway conditions and that provide those drivers with recommended speeds to safely negotiate a curve. The effectiveness of these signs were determined based on field analysis in 22 locations.

Engineering Speed Management Countermeasures: A Desktop Reference of Potential Effectiveness in Reducing Speed July 2014

Speed Management: A Manual for Local Rural Road Owners
This document provides information on how to develop a Speed Management Program that is tailored to meet the needs of local rural road practitioners.  A Speed Management Program can be effective in lowering the number of speeding crashes and the resulting fatalities and serious injuries on local rural roads.  This document describes the various elements of a Speed Management Program, including the principles of setting speed limits appropriate for roads within the jurisdiction and various countermeasures that are effective in mitigating speeding as it relates to roadway safety in rural areas.

1. FHWA conducted two speed management webinars in the Fall of 2012:
   • USLIMITS2 and Methods and Practices for Setting Speed Limits, September 20, 2012
   • Reducing Wet Weather Speed-Related Crashes, September 27, 2012
2. The presentations, transcripts, and recordings for both webinars are available at http://connectdot.connectsolutions.com/sr250uslimits/. Upon accessing the site, select the "Enter as Guest" option, enter your name, and click on Enter Room. Instructions on how to download the files and links to view the recordings are provided.

Analysis of Speeding-Related Crashes
Speeding is one of the most common contributing factors of traffic crashes. Data extracted from the Fatality Analysis Reporting System (FARS) show that the driver-level attribute "driving too fast for conditions or in excess of posted speed limit" is the critical contributing factor in more than 99 percent of all speeding-related fatal crashes, as defined by the National Highway Traffic Safety Administration (NHTSA). A marginal number of drivers were determined to be speeding through citations of speeding violations reported to FARS. To read the entire report, click on this link: Analysis of Speeding Related-Crashes: Definitions & the Effects of Road Environments (DOT-HS-811-090) (PDF).

Memorandum – Guidelines for the Use of Variable Speed Limit Systems in Wet Weather

Guidelines for the Use of Variable Speed Limit Systems in Wet Weather
This report provides guidance on the use of variable speed limit (VSL) systems in wet weather at locations where the operating speed exceeds the design speed and the stopping distance exceeds the available sight distance.

Manual on Uniform Traffic Control Devices (MUTCD)
The Manual on Uniform Traffic Control Devices (MUTCD) is the national standard for signing on all highways. Sections 2B.21-24 address regulatory speed limits and Section 2C addresses advisory speed signs. School zone speed limit signs are discussed in Section 7B.05 and work zone speed limits in Section 6B.

Procedures for Setting Advisory Speeds on Curves
The procedures described in the handbook are intended to improve consistency in advisory speed signing and, hopefully, driver compliance with the advisory speed. The handbook describes; 1) guidelines for determining when an advisory speed is needed; 2) criteria for identifying the appropriate advisory speed; 3) an engineering study method for determining the advisory speed; and 4) guidelines for selecting other curve related traffic control devices.

Speed Concepts: Informational Guide
Traffic speed is an important yet complex topic in the transportation engineering community. Furthermore, speed is of considerable interest to enforcement agencies, safety advocates, property owners, users of the transportation system, and the public at-large because of its perceived effect on crash risk. Each of these stakeholders perceives speed measures differently; therefore, many issues related to speed are either misunderstood or remain unanswered. This guide: 1) defines common speed-related terminology so that the guide’s contents can be clearly conveyed, 2) explains the differences between designated design speed, inferred design speed, operating speed, and posted speed limits, 3) illustrates perceptions and research conclusions related to the effects of speed, 4) documents speed-based technical processes, 5) summarizes State and local government agency roles and actions related to traffic speed, and 6) highlights speed management and mitigation measures. [FHWA-SA-10-001]

Speed Management Workshops

A series of pilot workshops were held around the country to provide platforms for researchers, engineers, law enforcement, judiciary, educators and policy makers to address engineering and enforcement issues. Building on the success of these workshops, the U.S. DOT has developed a Speed Management Workshop Guide and training to facilitate 2-day workshops in States and local communities.

State Practices to Reduce Wet Weather Skidding Crashes
This report provides guidance to states for implementing a program focused on reducing wet weather skidding crashes and identifies the four common components of existing state programs.

The Effect of Increased Speed Limits in the Post-NMSL Era, a Report to Congress, 1998. [PDF 407 KB]
Section 347 of the NHS Act required the Secretary of Transportation to study the impact of states' actions to raise speed limits above 55/65 MPH and report to the Congress by September 30, 1997.