Howard County is undertaking an investigation into the transportation challenges facing residents in the MD 99 corridor. In 2017, during public meetings on the County’s 2018 Priority Letter, many residents shared their concerns about the safety and congestion challenges on MD 99, especially in the section between Marriottsville Road and the US 29/MD 99 intersection. Recognizing these challenges, the County initiated an investigation into the traffic, safety, and congestion challenges on the MD 99 corridor. The investigation is focused on gathering data and information and the impacts on residents. The results will help guide future county and state actions.
The MD 99 Corridor Investigation originated in response to long-standing concerns by residents in neighborhoods bordering the corridor, as well as broader public concerns regarding safety and traffic in the corridor.
The County designed the project with the primary objective of developing short-term mobility solutions in the corridor to address five key themes which directly reflect public feedback and comments. These themes were used to structure the project; each theme was studied and analyzed to develop a range of recommendations around them. The findings and recommendations are presented an interactive online report format in which we detail the process, data, findings and recommendations. The interactive online report details:
The recommendations in the report are projects and programs that can address short-term mobility challenges. Longer term solutions for I-70 and US-29 will need to be addressed by MDOT SHA through capacity improvements as well as the Transportation Systems Management and Operations Program.
The next steps are as follows:
Please click here for the interactive online report. The online report also includes a comment form.
We have also developed a one-page summary document with the findings and recommendations. Please click here for the summary document.
Appendix A Traffic Count Data
Appendix B Signalized Intersection Analysis
Appendix C Public Comments
Appendix D Signal Timing at Intersections
Appendix E Traffic Signal Warrants
On Tuesday, December 11, 2018, the Office of Transportation held a meeting from 7 PM to 8:30 PM to share findings and recommendations from the Maryland Route 99 Corridor Investigation.
The investigation considered a wide variety of issues and concerns raised by residents, including:
The following materials were presented at the meeting, including a presentation, boards with existing conditions, findings and recommendations. Please review the presentations and boards and if you have any comments or questions please provide comments by:
We will also be developing written responses to some of the more detailed and complicated questions raised during the presentation. We will post them on the site as they are completed.
MD 99 Presentation
MD 99 Meeting Agenda
Information and Background Boards
Aerial maps of the MD 99 corridor
Public comments since 2017
Origin and Destination Results
Recommendation and Feedback Boards
Signal and Geometric Recommendations
Sight Distance Mitigation Recommendations
Bicycle & Pedestrian Improvement Recommendations
Transportation Demand Management
On Tuesday, February 6, 2018, the Office of Transportation hosted an open house from 5 PM to 8 PM at the at the George Howard Building (3430 Court House Drive, Ellicott City). The Open House provided a venue for community members to talk to staff and for staff to learn as much as possible from area residents to ensure the project team is are aware of t