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Our Projects

Challenge
  • Proper & sufficient messaging for filtering heavy vehicles out of the main traffic stream when there is no physical barrier
  • Sign placement in an urban setting
  • Short time frame for delivery
  • Continual changes to requirements & schedule imposed by the U.S. Secret Service
Our Solutions
  • Detailed field investigations to identify proposed static & dynamic sign locations
  • I-95 heavy vehicle detour planning
  • Detour signing plans
  • Messaging plan for 20 portable & approximately 70 permanent dynamic message signs
  • Cost estimate preparation
  • Plan updates during operation

Democratic National Convention

Mid AtlanticSignal & ITSTraffic & ParkingTransit
PennDOT District 6-0 | City of Philadelphia, PA
  • Democratic National Convention by McMahon Associates
  • Democratic National Convention by McMahon Associates
  • Democratic National Convention by McMahon Associates
  • Democratic National Convention by McMahon Associates
  • Democratic National Convention by McMahon Associates
  • Democratic National Convention by McMahon Associates

As a subconsultant working for PennDOT District 6-0, McMahon was retained to provide fast-track engineering planning and design services to implement a heavy vehicle ban on I-95 through Philadelphia for six days during the Democratic National Convention.  Over a period of approximately two months leading up to the convention McMahon performed detailed field investigations for identifying proposed static and dynamic sign locations.  We prepared detour signing plans to filter heavy vehicles from I-95 north and south to the detour route.  Plans were also prepared to reroute heavy vehicles through Philadelphia before entering the prohibited section of I-95.  McMahon prepared a messaging plan for all applicable regional permanent dynamic message signs in Pennsylvania (PennDOT, PA Turnpike and DRPA), Delaware (DelDOT), and New Jersey (NJDOT and NJ Turnpike).  A companion messaging plan was also prepared for over 20 portable dynamic message signs that were strategically implemented.  McMahon developed the PennDOT cost estimate for Department of Homeland Security reimbursement.  We also prepared and continually updated the detour implementation timeline that was used by PennDOT, the PA State Police, and the City of Philadelphia.  Finally, we prepared a handout for heavy vehicles inbound to the port of Philadelphia indicating preferred routes for avoiding I-95.  During the weekend hours of the detour implementation, McMahon staff drove and observed the detour operations with PennDOT staff and prepared updated plans within hours to make adjustments to the I-95 signing and operations to better allow State Police to stop detour violators.