Forum discussion
EBOM-v4.1 LTp1: Transportation Performance
Good Day!
We are unsure if the CO2 lb/mile values shown in Table 2 "Commuting transportation modes" of the LEED O+M v4.1 reference guide indicate the value per transport or person.
Example:
The CO2e lb/mile shown in the table should be used for each occupant using this transport ? or this value represents the CO2e lb/mile for the whole bus?
Same case for carpooling. This value shown in the table is per car or per person?
We would appreciate your help.
Excellent day!
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How should I distribute the survey? What if we want to use a “lobby blitz” approach?
What if we already participated in a local transportation survey? Can we use those results?
Is there a minimum response rate?
How often do we need to conduct the survey?
Some of our occupants commute by ferry. How do we account for this type of transit?
How can we determine the CO2e associated with each transit mode?
Yusuf Turab
Managing DirectorInHabit & BuildScape
23 thumbs up
January 18, 2024 - 2:31 am
This table 2 make no sense in my opinion. I have written to USGBC the following as we are getting a very low score inspite of providing 75 seater shuttle buses for over 90% of the occupants:
Hello
Thanks for the email. We did not understand what you are trying to convey with this sentence "Arc calculates "Percentage of trips" by the number of miles submitted in surveys, not by the number of people using it." could you please elaborate?
There still is something wrong with the way ARC considers bus travel. These textile companies spend huge sums to provide shuttle buses to employees as this is the greenest form of transport available and it keeps the cost for an employee to get to work at zero. It also encourages them to avoid using motor cycles which they would if it was not for the bus shuttle. Among the road transport options, doesn't bus travel have one of the lowest carbon footprints per person?
If the ARC platform uses the below CO2e values, we do not understand how the bus CO2e be so high? If the value 0.68 is per bus, then how can it be less than a solo car? surely the bus consumes a lot more fuel than an car. If the value 0.68 is per person then how can it be so high? It seems like 2 people travelling in a car or a single person travelling by a motorcycle is considered lower emission than 75 people travelling by bus? This is really confusing for us. Does this mean we must encourage our clients to buy 100s of cars and use them for providing shuttle service instead of say just 10 buses?
The CO2e calculated with the below method completely skews the results in favour of cars and motorcycles instead of buses. Or am I looking at it all worng? do help me understand.
An emissions value is calculated for each building occupant that completes the survey as follows:
1. A CO2e value is calculated for each route provided for the occupant, using the commuting transportation mode(s), distance traveled, transportation emissions factors, and Equation 1: Equation 1: CO2e for route (lbs.) = (CO2e lbs./mile) * distance traveled in miles
The transportation greenhouse gas emission factors use the latest U.S. Environmental Protection Agency’s (EPA) Emission Factors Hub for CO2e lbs. per occupant mile coefficients and are kept up to date with U.S. EPA release updates.
2. For each occupant, CO2e is calculated using Equation 2: Equation 2: CO2e for individual occupant (lbs.) = (∑ CO2e for route) / # routes