Document Library

NCHRP Research Report 1187: A Data-Driven Tool for Optimizing Maintenance Technician Staffing in Highway Fleet Operations, produced by TRB’s National Cooperative Highway Research Program, helps transportation agencies make transparent, consistent, and defensible workforce planning decisions. The Predictive Insights for Technician Staffing and Operational Planning (PITSTOP) tool supports data driven optimization of highway fleet maintenance staffing. Using vehicle inventory, maintenance history, and operational assumptions, it estimates technician-hour standards and converts them into full-time-equivalent staffing requirements. The tool integrates multiple datasets, provides a structured workflow for data preparation and analysis, and delivers dashboard-based results that identify staffing gaps and surpluses at the state, regional, and shop levels.

NCHRP Research Report 1185: Out-of-Service Utility Facilities: Management Throughout the Highway Life Cycle, produced by TRB’s National Cooperative Highway Research Program, provides guidance on practices for locating, identifying, tracking, and managing OOS utility facilities throughout the highway life cycle. The guide is designed to help transportation officials understand the risks associated with OOS utility facilities and implement strategies to reduce project delays, costs, and construction impacts. It also supports contractors, consultants, utility owners, and other stakeholders by increasing awareness of OOS utility issues and promoting practices that improve coordination, decision-making, and project outcomes.

NCHRP Research Report 1189: Fostering Implementation of Knowledge Management: A Guide, produced by TRB’s National Cooperative Highway Research Program, documents the evolution of KM at state DOTs, identifies successes and challenges, and provides strategies to support long-term KM investment and sustainability. The report is designed to help agencies adopt KM practices that minimize disruptions, maintain organizational continuity, and preserve crucial institutional knowledge as experienced employees retire or leave the agency.

TCRP Research Results Digest 119: Consolidating Microtransit and ADA Paratransit Services, produced by TRB’s Transit Cooperative Research Program, describes methods used by transit agencies to consolidate their ADA paratransit (or other coordinated paratransit) trips with on-demand microtransit service. TCRP Research Results Digest 119 summarizes one of 12 small research tasks conducted to support the development of new content for the Transit Capacity and Quality of Service Manual, Fourth Edition.

This research presents a quantitative framework to help agencies evaluate trade-offs between safety, efficiency, and equity when redesigning urban streets for multimodal operations and connected/automated vehicle (CAV) integration. The study introduces two complementary tools: a Network Fundamental Diagram (NFD)-based optimization model for system-level performance planning and a multi-agent simulation platform that evaluates real-world interactions among vehicles, pedestrians, cyclists, micromobility, and emerging modes.

Practitioners will gain insight into how to move beyond qualitative Complete Streets guidance by applying measurable objectives—including accessibility gaps, sufficiency thresholds, and maximin equity principles—to corridor and network design. The framework also incorporates advanced safety metrics (e.g., Time-to-Collision and impact severity) to evaluate both conflict likelihood and consequence. Case studies demonstrate how agencies can transparently compare design alternatives and make evidence-based decisions when trade-offs are unavoidable.

Alternative URLs for accessing the report:

https://figshare.com/articles/preprint/Making_CAV_Deployments_Compatible_with_Complete_Streets_Objectives_for_Safe_and_Efficient_Operation_Phase_II/31021405?file=60862168

https://www.dropbox.com/scl/fi/i5ozwm8a4tlje16u6hwjq/Making-CAV-Deployments-Compatible-with-Complete-Streets-Objectives-for-Safe-and-Efficient-Operation-Phase-II-Final-Report.pdf?rlkey=yajzaiq1q36osh1zkiclhv69w&e=1&st=8ofgbte4&dl=0

PIARC: Impact of the Development of Active Transport Modes in Road Tunnels – Current Situation Report and Case Studies examines the growing integration of active transportation modes—such as pedestrians, cyclists, and other vulnerable road users—within road tunnel environments. As cities seek to improve mobility, accessibility, and emissions outcomes, tunnel owners and operators face new safety, design, and operational challenges when authorizing active modes in these confined facilities. This international report compiles and evaluates case studies from around the world, highlighting how tunnels are being constructed or retrofitted to safely accommodate active users through infrastructure adaptations, equipment upgrades, and revised operational procedures.

The document categorizes examples into four approaches: tunnels with safety galleries usable by active modes, tunnels with protected spaces for active users, tunnels with specific geometric or operational adaptations, and tunnels dedicated entirely to active mobility. Drawing on global expert contributions, the report outlines the state of practice and identifies key considerations for safety, risk management, and coordination with emergency services. It provides a foundation for future recommendations to guide decision-making by tunnel owners, designers, safety professionals, and transportation agencies considering active mode integration.

Throughout its more than 25-year history, the Transit Capacity and Quality of Service Manual (TCQSM) has compiled the state of the practice based on peer-reviewed research published by the Transportation Research Board and others. The TCQSM provides transportation practitioners of varying levels of experience and responsibility information, techniques, and resources to support the planning, design, and operation of transit services, facilities, and systems. While the TCQSM’s methods represent the best available knowledge at the time of publication, they do not establish policies regarding desirable or appropriate levels of quality of service or capacity for transit services, facilities, or systems.

TCRP Research Report 262: Transit Capacity and Quality of Service Manual, 4th edition, includes updated statistics, transit agency application examples, and photographs. The manual incorporates emerging mobility options such as microtransit and low-speed automated vehicles, with expanded coverage of widely adopted technologies such as bus and ferry electrification. This edition updates key concepts related to modes and services, operations, and quality of service. Additional updates address topics including quality of service measures and applications, bus transit, demand-responsive transit, rail transit, ferry transit, and transit stops and stations.

This conduct of Research Report for NCHRP Project 20-44(40) was submitted July 2025. It accompanies the Transportation Agency Capability Building Web-Based Guide in order to support implementation efforts and build upon the framework established in NCHRP 20-24(95) and facilitate the use of ACB guidance by transportation agencies. Practitioners may also find the Performance Management Reporting Peer Exchange Final Report – NCHRP Project 20-24 Task 124 (2019) of interest as well.

The Using Performance Management to Respond to Uncertainty Peer Exchange was a collaborative forum designed to facilitate the sharing of noteworthy practices and lessons learned in applying transportation performance management (TPM) approaches to manage unexpected disruptions and changes. The peer exchange brought together State DOTs, FHWA, and other transportation agencies to discuss the latest strategies, tools, and resources for improving transportation agency adaptation. The peer exchange aimed to apply and advance TPM practice to help agencies respond to uncertainty, foster a collaborative environment to improve outcomes using performance management, and engage in peer-to-peer problem-solving, sharing noteworthy TPM practices, and exploring innovative solutions to enhance transportation agency adaptability in the face of uncertainty. This summary details the content, discussions, and resources shared during the peer exchange.

The 15th National TAM Conference on Transportation Asset Management was held Aug 25-28 in Chicago, IL, USA. Materials from the conference sessions are linked in the attached conference program in the "Schedule At-A-Glance" section. For more information on individual sessions, please refer to the detailed agenda on the conference site.

NCHRP Web-Only Document 460: Designing for Target Speed, Volume 1: Operating Speed and Road Elements, produced by TRB’s National Cooperative Highway Research Program, defined target speed as a speed selected for a roadway during the design process that guides planning, design, and operational decisions and results in a roadway with a driving environment that encourages drivers to operate at or below that selected speed. In addition to research that describes findings related to operating speed and factors that potentially influence it, the report looks at several state departments of transportation and cities that incorporate target speed into roadway design guidance. These agencies use context classifications based on roadway, multimodal, and surrounding land-use characteristics to help select appropriate target speeds and identify speed management treatments. Many also emphasize choosing achievable target speeds and evaluating treatment effectiveness over time.

The same project that produced NCHRP Web-Only Document 460: Volume 1 also developed NCHRP Web-Only Document 460, Volume 2: Implementation Guide for practitioners to help to incorporate target speed into the design process.

This report summarizes the findings and recommendations from dozens of after-action reviews conducted over an 18-month period, focusing on interstate work zones and maintenance of traffic (MOT) procedures. The underlying reports compile data including project locations, visual imagery, connected vehicle summary graphics, and qualitative discussions to evaluate work zone efficacy. By synthesizing these reviews, the document identifies systemic challenges in the intersection of traffic control design and field execution, offering actionable insights to improve safety, communication, and traffic flow.

The document details six primary themes and recommendations aimed at improving future MOT planning. It addresses geometric inaccuracies in design plans—such as failing to account for constraints like bridges and guardrails—and suggests using LiDAR surveys to achieve more precise dimensions. Additionally, it highlights the need for smoother vehicle transitions during lane shifts, better communication between design engineers and temporary traffic control contractors, and structured project close-out reviews to document lessons learned. Finally, the document provides tactical recommendations for managing traffic capacity, calling for standardized guidelines for rolling slowdowns within the Indiana Department of Transportation's oversight and stricter scheduling for barrier wall deployment to mitigate severe traffic queuing.