As part of the ACATS program (Program to Advance Connectivity and Automation in the Transportation System) sponsored by Transport Canada, a large-scale field test was conducted for the first time to determine the extent to which a Green Wave Assistant can reduce fuel consumption and C02 emissions in urban areas.
The project was conducted by Carleton University, Traffic Technologies Services, Thompson Technologies and the City of Ottawa in the summer of 2019.
In the test field, the fuel consumption of seven test drivers of different ages of the Ottawa urban vehicle fleet was compared over eight weeks (each between 7 a.m. and 3 p.m.) with and without Green Wave Assistant. During this period, almost 24,000 kilometers were driven in the Ottawa metropolitan area with a total of 1178 traffic signals, 65% of which sent data to the Green Wave Assistant. Ottawa’s traffic signals do not use a fixed time program, but switch adaptively depending on traffic demand from different directions.
The result was a fuel saving of 7% on average on routes where the Green Wave Assistant was active. Taking into account all routes driven (including motorways and traffic lights where the Green Wave Assistant was not available), fuel savings of an average of 5% or 0.883 l/100 km were determined.
The youngest and most dedicated test driver even achieved a saving of 14.4%, which may give an indication of the savings that can be achieved when driving autonomously.
Projections on a fleet of 900 vehicles (50% petrol and 50% diesel engines) showed a saving of 121 500 litres of fuel per year and 281 310 kg CO2.