Interstate Access Point Approval
In October 2022, the Federal Highway Administration (FHWA) approved the application for Interstate Access Point Approval (IAPA) prepared by the Maryland Department of Transportation State Highway Administration (MDOT SHA) in accordance with Title 23, U.S.C., Section 111. An IAPA is required for any project with new or modified access to an interstate facility, such as I-495 and I-270. The IAPA application includes the results of MDOT SHA’s safety and operations analyses and confirms the new or modified access points in the Selected Alternative will not have a significant adverse impact on the safety and operation of the interstate facility or local street network. The Draft IAPA Application was included as Appendix B in the Final Environmental Impact Statement and the Final IAPA Application and Appendices
- Application for Interstate Access Point Approval (IAPA)
- Appendix A – IAPA Framework Document
- Appendix B – Traffic Volume Diagrams
- Appendix C – Preferred Alternative Lane Diagrams
- Appendix D – Design Criteria Documents
- Appendix E – Design Exceptions (Under Development)
- Appendix F – Conceptual Guide Signing Plan
- Appendix G – VISSIM Calibration Memo
- Appendix H – VISSIM Analysis Results
- Appendix I – Synchro Analysis Results
- Appendix J – Historical Crash Data and Supporting Information
- Appendix K – Predictive Crash Analysis Results and Supporting Information