Air Quality and Emission Tools
These tools are built as educational tools (see all tools here).
VAPIS tool is designed to illustrate how to build an emission inventory for on-road vehicles and explain the main components of this methodology. The three main inputs required — on-road number of vehicles, km travelled, and an emission factor.
Each of these components requires information drawn from multiple databases, to put together a clean and operational inventory for other applications. Conducting these surveys is not a simple task, as it demands considerable physical effort and financial resources.
What this tool aims to do is illustrate a back-of-the-envelope methodology for calculating one of those components: Vehicle Kilometres Travelled (VKT) — The underlying assumption is straightforward — if we know the average speed of a vehicle and the average number of hours it spends on the road each day, multiplying the two gives us VKT for that fleet per day, which can then be used in further calculations.
In this example, we also calculated CO2 emissions, but the same approach can be applied to calculate emissions of other pollutants as well.
In this illustration, vehicle names (and fuels) can be edited as per users preference. User can enter values only for 2 or 4 or all ten vehicles. We limited this number to 10 — for more flexibility, use the excel file.