C O N T E N T S
Heavy Duty Trucking
The Business Magazine of Trucking
JULY 1996
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S P E C I A L       F E A T U R E S

FATIGUE: ASLEEP AT THE WHEEL?
Researcher claims federal study proves truckers suffer 'microsleeps' 		12
SPECIAL REPORT: SAFETY UPDATE
Anti-truck group's "empowerment" conference for accident victims erupts in public confrontation. 30
Study shows states mislead motorists on sharing the road with trucks 34
ENGINE OILS: PUSHING NEW LIMITS
Clean air regs and new diesel engine designs are forcing more new oil classifications 		50
MAINTENANCE: SHOP EQUIPMENT
Take care of your tools so they can take care of your trucks. Includes buyers guide of equipment to keep your shop in shape 		56
SMART SPEC'ING: STEER AXLES
Not many things on a truck get to the destination before the steer axle 		66
FUEL: THE DRIVE TO CONSERVE
Temperature extremes can put a severe dent in fuel mileage numbers. Here's how to minimize the impact 		73


I N D U S T R Y
kinder, gentler inspection blitz 26
private fleet operating costs 27


E Q U I P M E N T
FREIGHTLINER DEVELOPMENTS 86
PETERBILT ENHANCED MODEL 320 89
LIGHTWEIGHT FRONT BRAKE DRUM 89
DOMINION LAMPS, WIRING SYSTEM 89
MACK UNVEILS SIX-SPEED 92
YOKOHAMA ON/OFF ROAD TIRE 92
AUTOMATED ROCKWELL TRANSMISSION 96
VOLVO XPEDITOR, SERVICE PROGRAM 98
UTILITY DRY FREIGHT GROCERY VAN 98
TRUDIM DIMMABLE MIRRORS 98
ISUZU RETARDER, CLASS 8 MODEL 100
SPICER SOLO CLUTCH 100
HALDEX SLACKS LUBED FOR LIFE 100
CONMET TRAILER HUBS 100
EATON FULLER TRANSMISSION FAMILY 104
JACOBS DRIVELINE BRAKE 105
EATON TRAILER AXLES UPGRADED 105
EXXON OIL DRAIN PROGRAM 108
SPICER EXTENDED-LIFE DRIVELINES 108


D E P A R T M E N T S
CARRIER NOTES 128
CLASSIFIEDS 135
COMMUNICATIONS 116
DIESEL PRICE WATCH 123
EVENTS 58
HOTLINE 40
LETTERS 109
LOAD TRENDS 130
NEW PRODUCTS 126
PIPELINE 123
SHOP TALK 124
SUPPLIERS 127
TECHNOLOGY 110
TRAINING 72
TRUCK SALES FIGURES 44
WRITE-FORS 134


E D I T O R I A L
DOUG CONDRA
EDUCATING MOTORISTS		 8


C O L U M N S
RYDER ON EMISSIONS
A NOVEL IDEA 		22
WINSOR ON EQUIPMENT
LICENSE TO PROFITEER? 		28
KENWORTHY ON SAFETY LAW
PROPOSED OVERHAUL FALLS SHORT 		112
STADDEN ON TECHNOLOGY
BLASTING MY FAVORITE TARGET 		114
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