Innovative landscaping

January 17th, 2012 - Joe Duarte

MTO hopes the use of rubber modified asphalt in this project helps future development of the technology.

rubber-asphaltOntario ministry turns tires into pavement

Ontario’s Ministry of Transportation (MTO) has received a recognition award from the province’s Environmental Commissioner (ECO) for its promotion of stormwater management, waste diversion and car-pooling.

At the car-pool lot in Beamsville, (between Hamilton and St. Catharines, Ontario), the MTO uses rubber modified asphalt (RMA) for paved surfaces and bioretention cells to handle the run-off after storms.

RMA is made from scrap rubber tires, which are ground down and mixed with conventional hot mix asphalt. About four tonnes of scrap rubber tires were used for the carpool lot on the at the Ontario street ramps to the Queen Elizabeth Way (QEW), diverting 624 tires from landfill sites. The MTO hopes the use of RMA in this project helps future development of the technology to use more scrap tires and fewer virgin natural resources for paving projects.

The bioretention cells mimic natural ponds and bogs by filtering, evaporating and detaining sediments that flow from the pavement, while also treating pollution at its source. Because of their “natural” qualities, they also act as habitats for wildlife, improve air quality and reduce the urban heat island effect. Approximately 4,000 cubic meters of runoff is filtered through this particular system each year (the equivalent to two Olympic sized swimming pools).

“This is the second year in a row that MTO received this award,” said Gord Miller, Environmental Commissioner of Ontario. “The ministry provided a good example for municipalities, agencies and the public sector for use in future road planning and construction. I look forward to seeing more such innovative efforts to conserve our environment from other ministries.”

ECO hands out recognition awards every year to government agencies based on environmental initiative projects.

 

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