● The same height and width of a semi trailer-essentially the maximum allowable.


● The vehicles will be battery powered with electric drive axles. Other forms of power/propulsion

are possible, though not preferred.


● They will be Initially manned, but optionally, and eventually, autonomous.


● The initial concept will focus on cleaning particulates - PM2.5 and ultra-fine particles (UFP).

though some of the gases produced by internal combustion - NO, CO2, SO2, VOC’s - may also

be targeted at some point.


● The Initial concept will incorporate a specially designed HEPA filter. Further refinements or

possibilities include a wet scrubber, such as a venturi system, an electro-static precipitator; a dry

bed system for gases, or any combination of these. The HEPA filter probably has the least cost

and complexity.


● The filtering system will include pre-filters for water, corser particulates, bird strikes.


● The HEPA filter must be capable of very high flow rates, and large face pressures.


● The system may include internal fans, although the main method of generating air flow is vehicle

motion. It must be capable of efficient filtering at vehicle speeds as low as 5 - 10 mph and as high

as 60 mph.


● The vehicle will have pollution sensors to gage the concentration of the relevant pollutant -

typically particulates.


● The tires on the vehicle may be Run Flats - military tires that can still function after deflation.

The purpose of this is to ensure continuity of operation while driving on a road shoulder that may

have debris or other sharp objects.


● A potential variation of this concept is to combine this air pollutant scrubbing function with that.


● The vehicle may have Independent suspensions both front and rear for obstacles and so roll

stiffness can be carefully calibrated with roll bars or some other device.


● Both front and rear axles can steer independently for greater mobility. This will provide a tighter

turn radius, and lateral movement. This is to facilitate obstacle avoidance on roads and

particularly on shoulder. Possible independent steering at each wheel for zero radius turns.

● The vehicle will display on itself various statistics related to this program - e.g., current

particulate concentration, amount of pollution collected that day, lives saved, illnesses prevented,

days added to climate deadline, i.e., point of no return.

● This vehicle will also capture non-exhaust particulates - particles from brake pads, tires, lubrication

oils that account for approximately 10% of roadway particulates.