[ortusdux]

Here is the original environmental impact study from USPS - https://uspsngdveis.com/documents/USPS%20NGDV%20Draft%20EIS....

"14.7 miles per gallon (mpg) (without air conditioning) 8.6 mpg (with air conditioning)"

The same document estimates off the shelf commercial right hand drive vehicles averaging 6.3 mpg if used fleet-wide.

[jdashg]

Same MPG but now with AC is a huge win!

[ortusdux]

I'd like to see the ratio of hours with AC on vs off fleet-wide after the first year.

From a 2019 IEA report: "Estimates from the literature reveal that around 6% of the annual global energy consumed by cars is used for MAC(mobile air conditioning), varying by country between about 3% and 20% depending on climate, driving patterns and traffic congestion. It can peak at over 40% in warm climates and congested traffic. This equates to around 1.2 Mboe/d consumed by MAC units in cars alone, with other road vehicles adding another 0.6 Mboe/d. For electric vehicles, MAC can reduce driving range by up to 50% on hot and humid days."

https://www.iea.org/reports/cooling-on-the-move

[sofixa]

> "14.7 miles per gallon (mpg) (without air conditioning) 8.6 mpg (with air conditioning)"

Both of those are absolutely embarrassing, did they use a 1950s Soviet tank engine? According to a quick Google search, a Ford Transit (bigger sized but not optimised for post delivery van) gets 33-46 mpg depending on the engine.

Yeah, a post vehicle will start/stop much more, but that's where start/stop tech, and maybe even hybrid come in.

[adgjlsfhk1]

An open door will kill your mileage. USPS vans are designed for an incredibly specific role.