The issue we are facing presently is that we are pulling the total time of journey from maps. This however isn't the best way to get accurate emissions for public transport since:
- The total time includes the time taken to actually walk to the Bus stop or a transit station.
- It also includes the time idled in waiting for the next connection. Sometimes this waiting time can be very long owing to the operating times of the public transport.
Note in the above picture that time spent in walking is more than 25% of the total time of the journey. Therefore, this directly offsets the calculated emissions by 25% from the true value.
An extreme example of the time spent in idling can be seen below.
The issue we are facing presently is that we are pulling the total time of journey from maps. This however isn't the best way to get accurate emissions for public transport since:
Note in the above picture that time spent in walking is more than 25% of the total time of the journey. Therefore, this directly offsets the calculated emissions by 25% from the true value.
An extreme example of the time spent in idling can be seen below.