Our role—Our first step was to establish horizontal and vertical project control throughout the project limits. Using the control network, we captured detailed data about the asphalt road surfaces, bridge surfaces and drainage features, including more than 800 catch basins and manholes. We checked air quality in each drainage structure prior to opening them and took digital photographs that were linked to the structure locations.
Captured field data was merged with photogrammetric data to create a total project digital terrain model (DTM). DTMs were created for each bridge deck so that design could be completed both above and below existing bridges. The digital photographs of each drainage structure were tagged to their location in all AutoCAD drawings.
This portion of Highway 427 is one of the busiest stretches of road in Ontario. Collecting data in a safe manner required careful coordination with traffic control subcontractors. Crash trucks and lane closures were used on a daily
basis. Much of the field survey on this project was done at night.
 |
|||
 |
|||
 |
