Elevated Frontage Roads & Egress Roads Pearson International Airport

Two key components of the $4.4-billion redevelopment of Toronto Pearson International Airport are the Elevated Frontage Roads and Egress Roads projects.  

The award-winning Elevated Frontage Roads is a three-level road system serving the new terminal building for a length of approximately 1,640 ft. Each level consists of an inner road with three traffic lanes for public/commercial vehicles and an outer road with four traffic lanes for private vehicles. The service level is on-grade, while the arrival and departure level decks are formed by a double-deck bridge system. The inner and outer lanes are separated by 6.5 ft wide light wells except at pedestrian crossover areas and common pier beam areas. The double decks are staggered so the outer departure level also acts as a roof structure over the Arrivals Hall. The entire road system is curved in plan. The double-deck bridge system consists of 40 in deep solid post-tensioned concrete decks, continuous over three spans. Columns are continuous from the upper departure level down through the arrival level to caissons drilled down to and socketed into the bedrock. HMM was responsible for the planning, design development, system analysis, schematic design, detailed analysis and design, contract document production, tendering, and construction administration/inspection services.

The Egress Roads project involved bridge structures to carry traffic from the three-level road system fronting the new terminal building to the new parking garage, highways 409/427, Airport Road, and internal circulation roads. The system is a multi-level arrangement of bridges requiring 18 multi-span structures, with non-standard plan types, span arrangements, and support conditions. All columns, pier shafts, pier frames, and abutments are supported on caissons drilled down to and socketed to the bedrock. HMM carried out preliminary design, planning, structure selection, detailed analysis and design, lighting, electrical and drainage design, contract document production, and construction support services.