Diesel Emissions Quantifier 

Default Values 
Diesel Emissions Quantifier
 

Default Values
 

Transportation and Regional Programs Division 

Office of Transportation and Air Quality 

U.S. Environmental Protection Agency 

NOTICE 

This technical report does not necessarily represent final EPA decisions or 

positions. It is intended to present technical analysis of issues using data 

that are currently available. The purpose in the release of such reports is to 

facilitate the exchange of technical information and to inform the public of 

technical developments. 

EPA-420-B-10-035 

August 2010 
Diesel Emissions Quantifier Default Values 

The purpose of this document is to provide users of the Diesel Emissions Quantifier (DEQ) with 

default values for certain input fields. However, the use of “real world” data for these fields will 

provide a more accurate assessment of emission reductions and is strongly encouraged. 

On Highway 

Vehicle Type Vehicle 

Class 

VMT/ 

(mi/yr) 

Fuel use 

(gal/yr) 

Idling 

hours 

(hr/yr) 

Source 

School Bus School Bus 13,000 1,597 270 NCDC Cost Effectiveness 

Report, MOBILE6, Clean 

School Bus USA Program 

Transit Bus Transit Bus 35,000 - 5,000 – 600a Federal Transit Association, 

40,000 5,700 American Public Transportation 

Association, California Air 

Resources Board 

Refuse Hauler Class 7 45,149 6,060 730 MOBILE6, SmartWay Program, 

SmartWay Fleet Model 

Short Haul 

Truck 

Class 5, 6, or 

7 

See Table 1b See 

Table 1b 

730 MOBILE6, SmartWay Program, 

SmartWay Fleet Model 

Long Haul 

Truck 

Class 8 100,000 16,667 2,400 SmartWay Program, SmartWay 

Fleet Model 

Delivery Truck 

(beverage, 

bulk, etc.) 

Class 5, 6, or 

7 

See Table 1b See 

Table 1b 

730 MOBILE6 

Emergency Class 5, 6, of See Table 1b See MOBILE6 

Vehicle (fire 7 Table 1b ___ b 

truck, 

ambulance, 

etc.) 

City/County 

Vehicle (utility, 

DOT type 

truck) 

Class 5, or 6 See Table 1b See 

Table 1b ___ b 

MOBILE6 

Table 1a. Default values for certain fields in the Diesel Emissions Quantifier. See figure 1 at the 

end of this document for a visual description of vehicles by class. 

a

 This value is based on rough information from a variety of sources and is subject to change as 

more accurate data becomes available. 

b Due to the uncertainty of time an emergency vehicle is at a particular location and the variety of 

city/county vehicles, it is not possible to estimate default idling hours for these vehicle types. 

Vehicle 

Type 

VMT/ 

(mi/yr) 

Fuel use (gal/yr) Sources 

Class 5 19,610 2,448 MOBILE6 

Class 6 45,149 5,526 MOBILE6 

Class 7 45,149 6,060 MOBILE6 

Table 1b. Default values for certain fields in the Diesel Emissions Quantifier. 

Last updated: 3/2/2009 
Diesel Emissions Quantifier Default Values 

Nonroad 

Vehicle Type Usage rate 

(hr/yr) 

Power 

(Hp) c 

Fuel use 

(gal/yr) 

Source 

Agriculture 

2-wheel tractor 544 11 148 NONROAD model 

Agricultural 

Mowers 

363 100 944 NONROAD model 

Agricultural 

Tractors 

475 175 1,855 NONROAD model 

Balers 95 75 254 NONROAD model 

Combines 150 300 848 NONROAD model 

Irrigation Sets 749 100 1,716 NONROAD model 

Off-Highway 

Tractors 

855 750 22,584 NONROAD model 

Off-Highway 

Trucks 

1641 750 43,422 NONROAD model 

Other Ag 

Equipment 

381 175 1,912 NONROAD model 

Sprayers 90 175 438 NONROAD model 

Swathers 110 100 330 NONROAD model 

Ports and Airports 

AC Refrigeration 1341 50 1491 NONROAD model 

Aerial Lifts 384 50 277 NONROAD model 

Airport Support 

Equipment 

732 175 4,354 NONROAD model 

Cranes 990 175 4,403 NONROAD model 

Forklifts 1700 75 5,429 NONROAD model 

Off-Highway 

Tractors 

855 750 22,584 NONROAD model 

Off-Highway 

Trucks 

1641 750 43,422 NONROAD model 

Other Construction 

Equipment 

606 300 6,012 NONROAD model 

Other General 

Industrial 

Equipment 

878 100 1,841 NONROAD model 

Other Material 

Handling 

Equipment 

421 175 674 NONROAD model 

Signal Boards 535 25 265 NONROAD model 

Skid Steer 

Loaders 

818 75 578 NONROAD model 

Terminal Tractors 1257 175 6,780 NONROAD model 

Rail 

Aerial Lifts 384 50 277 NONROAD model 

Cranes 990 175 4,403 NONROAD model 

Forklifts 1700 75 5,429 NONROAD model 

Line Haul 

Locomotive 

4350 2000 27,150 NONROAD model 

Last updated: 3/2/2009 
Diesel Emissions Quantifier Default Values 

Vehicle Type Usage rate 

(hr/yr) 

Power 

(Hp) c 

Fuel use 

(gal/yr) 

Source 

Off-Highway 

Trucks 

1641 750 43,422 NONROAD model 

Off-Highway 

Tractors 

855 750 22,584 NONROAD model 

Other General 

Industrial 

Equipment 

878 100 1,841 NONROAD model 

Other Materials 

Handling 

Equipment 

421 175 674 NONROAD model 

Passenger 

Locomotive 

4350 2000 27,150 NONROAD model 

Switch Locomotive 4450 2000 22,250 NONROAD model 

Terminal Tractor 1257 175 6,780 NONROAD model 

Construction 

Bore/Drill Rigs 466 175 1,955 NONROAD model 

Cement & Mixers 275 75 137 NONROAD model 

Cranes 990 175 4,403 NONROAD model 

Crawler Tractors 936 175 8,887 NONROAD model 

Crushing/Proc. 

Equipment 

955 16 3,115 NONROAD model 

Dumpers/Tenders 566 300 284 NONROAD model 

Excavators 1092 175 6,063 NONROAD model 

Forklifts 1700 75 5,429 NONROAD model 

Graders 962 300 6,175 NONROAD model 

Off-Highway 

Tractors 

855 750 22,584 NONROAD model 

Off-Highway 

Trucks 

1641 750 43,422 NONROAD model 

Other Construction 

Equipment 

606 300 6,012 NONROAD model 

Pavers 821 175 2,980 NONROAD model 

Paving Equipment 622 175 1,473 NONROAD model 

Plate Compactors 484 6 82 NONROAD model 

Rollers 760 100 2,216 NONROAD model 

Rough Terrain 

Forklifts 

662 75 2,042 NONROAD model 

Rubber Tire 

Loaders 

761 175 5,721 NONROAD model 

Scrapers 914 600 11,086 NONROAD model 

Signal Boards 535 25 265 NONROAD model 

Skid Steer 

Loaders 

818 75 578 NONROAD model 

Tractor/Loader/Ba 

ckhoe 

1135 100 1,472 NONROAD model 

Table 2. Default values for certain fields in the Diesel Emissions Quantifier. 

c

 In the NONROAD model, the horsepower range for an individual application can vary greatly. 

To simplify this, the horsepower of the highest population application will be employed. 

Last updated: 3/2/2009 
Diesel Emissions Quantifier Default Values 

Figure 1. Truck Types by gross vehicle weight. 

Last updated: 3/2/2009