| NCHRP 05-10 | A Mobile System for Measuring Retroreflectance of Traffic Signs | Completed | |
| NCHRP 05-11 | Implementation Strategies for Sign Retroreflectivity Standards | Final | |
| NCHRP 05-12 | Requirements for Application of Light Emitting Diodes (LEDs) to Traffic Control Signals | Final | |
| NCHRP 05-13 | Illumination Guidelines for Nighttime Highway Work | Completed | |
| NCHRP 05-13(2) | Illumination Guidelines for Nighttime Highway Work | Completed | |
| NCHRP 05-14 | Advance Warning Arrow Panel Visibility | Completed | |
| NCHRP 05-15 | Visibility Performance Requirements for Vehicular Traffic Signals | Completed | |
| NCHRP 05-16 | National Calibration Standards for Measuring Retroreflectivity | Completed | |
| NCHRP 05-17 | Safety Evaluation of Permanent Raised Pavement Markers | Completed | |
| NCHRP 05-18 | Color Effectiveness of Yellow Pavement Marking Materials | Completed | |
| NCHRP 05-19 | Guidelines for Roadway Lighting Based on Safety Benefits and Costs | Completed | The research has been terminated. Papers on various aspects of the research are available at the links provided below. |
| NCHRP 05-20 | Guidelines for Nighttime Visibility of Overhead Guide Signs | Completed | |
| NCHRP 05-21 | Safety and Performance Criteria for Retroreflective Pavement Markers | Final | Research complete. Final Report published as NCHRP Research Report 1015 |
| NCHRP 05-22 | Guidelines for Solid-State Roadway Lighting | Completed | |
| NCHRP 05-22A | Gaps and Emerging Technologies in the Application of Solid-State Roadway Lighting | Completed | Publication decision pending. |
| NCHRP 05-23 | Effects of LED Roadway Lighting on Driver Sleep Health and Alertness | Completed | |
| NCHRP 05-24 | Development of Guidelines for Vehicle and Equipment Marking and Lighting | Final | Published as NCHRP Report 1085 on 1/23/2024 |
| NCHRP 05-25 | Guide to the Contextual Application of Overhead Lighting on Highways | Active | |
| NCHRP 05-26 | Development of Updated Warrants for Roadway Lighting | Pending | Contract pending at this time. |
| NCHRP 05-27 | Guide for Lighting at Innovative Intersections/Interchanges, including Roundabouts | Pending | |