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Police Vehicles

From: domainremoved <Steve>
Date: Tue, 11 Jun 2019 10:24:57 -0700

As an environmentalist, I support the City's goal to reduce greenhouse
emissions through the use of fuel-efficient vehicles, including alternative
fuels plus the goal of moving to all-electric vehicles whenever practicable.

Furthermore, the City should consider the entire life-cycle of vehicles
within its vehicle fleet strategy. A life-cycle approach means factoring
the energy used to create the vehicle, the materials used in the vehicle,
maintenance, consumables other than fuel, life expectancy, and responsible
recycling or re-use of the vehicle as its reaches end-of-life.

A vehicle fleet strategy also recognizes that not only do vehicles fall
into different classes (from riding lawn mowers to large trucks, heavy
equipment, various sizes of passenger cars and today's topic, police cars)
with a huge range of use cases.

For example, some vehicles will almost always be in motion while others may
have their engines running, but slow-moving or stationary; some may largely
be used on city streets, others off road in parklands; some will seldom be
driven about 30 mph and others use our freeways on a daily basis.

The City can best meet its green objectives by setting overall fleet
standards for carbon emissions rather than a piecemeal vehicle by vehicle
approach. This is especially relevant when the automotive industry is in
the transition from carbon-based fuels to alternative fuels (such as
hydrogen and biodiesel), hybrid, and all-electric vehicles.

Given the rapid evolution of consumer-level electric vehicles, it is
natural to ask which vehicles in the CIty's fleet are good candidates for
all-electric? The answer at this time is consumer passenger cars. So why
not police cars?

To begin with, given the amount of additional equipment in a police
vehicle there is a huge weight differential. Heavier cars place an
increased load on electric batteries, significantly decreasing efficiency.

Some of this additional equipment in a police car requires power, such as
computer and communication systems, another load on batteries.

Police vehicles also spend a good deal of time at the scene of an incident,
no moving (so no regenerative braking) with all of their emergency lights
and other electronics and AC running.

In short, there's a reason no manufacturer makes all-electric police cars:
it is currently not a good fit for current battery technology.

This is why I support the next best alternative: hybrid gas-electric police
vehicles, built on a common chassis (to allow swapping of parts and ease of
maintenance, a common practice in fleet management), with consideration
given to the life-cycle management, mentioned previously.

In my own household, we have two vehicles one all-electric and one hybrid,
so we have personal experience with both technologies and recognize the
pluses and minuses of each. As I member of the Chief of Police Advisory
Committee (I am not speaking for the committee but as a private citizen) I
have insight into police operations that other citizens may not have.

Fleet efficiency? Yes! A goal of all-electric vehicles? Yes! Are we there
yet? Nope. But we will get there and meanwhile, we need to match today's
technology with what's best for the use.


*Steve Taffee*
*600 Willow Rd, Unit 10, Menlo Park, CA 94025*
Received on Tue Jun 11 2019 - 10:19:46 PDT

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