Every fleet has a driver who gets the best fuel mileage. The question is how to get the rest of the drivers handling a truck the same way.
Fuel cost stakes have risen. Running a Class 8 truck now costs $2.336 a mile, the highest figure in the history of the American Transportation Research Institute’s annual cost report. Fuel is about 48 cents of that, second only to driver wages.
Route planning, load weight, and engine spec all affect fuel consumption, and all three are locked in before the truck rolls. Driving technique is not: it is decided in the cab, which means the right real‑time feedback and the right incentives can improve it.
Why two drivers in the same truck burn different amounts of fuel
In practice, the fuel gap between two drivers comes down to accelerator pressure, gear selection, how early a driver anticipates a stop, and how much of the run stays on cruise control. Speed, especially, carries a known cost with fuel economy dropping about 0.1 mpg for every mile per hour above 60, a rule of thumb from the North American Council for Freight Efficiency published by FleetOwner in January.
The effect of driving behavior is hard to see while the truck is rolling. The impacts typically show up weeks later in the fuel bill, where, mixed in with price swings and mileage changes, it’s hard to trace back the cost to any one driver or habit.
How to close the gap between driver habits and the fleet fuel bill
The ISAAC Fuel Coach works in the cab, while the truck is moving. It analyzes more than 100 parameters from the truck’s data network, up to 200 times per second, and turns that data into color-coded indicators on the ISAAC tablet. Green means the accelerator pressure suits the load and the road. Yellow means the driver is approaching the limits of optimal pedal pressure. Red means the pedal pressure is too high. The same screen flags when to shift, when to use cruise control, and when to let momentum carry the truck.
The timing of driver feedback is what separates real‑time coaching from reporting, and what makes a difference for saving fuel. A report a driver reads on Friday cannot change a behavior that occurred on the previous Tuesday.
What makes a fuel efficiency score fair and credible with drivers
Drivers stop trusting a driving performance scorecard the moment it marks them down for something they had no control over. A truck pulling a loaded trailer up a grade into a headwind burns more fuel than one running light on flat ground, and a score that cannot account for that is a score drivers argue with instead of act on.
The ISAAC Fuel Coach accounts for conditions outside the driver’s control, including load, road slope, wind, aerodynamics, and engine type. It scores how the truck was driven against the conditions it was driven in. With the ISAAC Fuel Coach, a driver on a hilly route and a driver on a flat one are both measured on their driving, not on their route, which is what makes the score fair and credible to drivers.
How to move the fuel efficiency score across the fleet
A 10-point driving score gain is widely achieved among fleets that pair the ISAAC Fuel Coach with a performance incentive program, according to ISAAC’s own published figures. Getting drivers to change how they drive, and keep at it, is in big part a management job: deciding what a good score is worth, saying so in writing, and following up with drivers about driving behaviors to improve while events are still recent. A driver scorecard gives drivers and managers the same set of numbers to talk about.
What a better score delivers
ISAAC publishes four results for a 10-point gain in a driver’s ISAAC Fuel Coach score:
● up to 5% lower fuel consumption
● 40% lower collision odds
● 70% lower hard-braking odds
● 80% lower hard-turn odds
The fuel figure comes from ISAAC’s own fleet data; the three safety figures from an independent Traffic Injury Research Foundation study. All four of these results have been achieved by fleets that paired the ISAAC Fuel Coach with an incentive program. This means a program built to cut fuel costs doubles as a safety program.
VA Transport puts in‑cab coaching to the test
VA Transport, a Canadian carrier with over 100 trucks, built its bonus program on driving performance scores. Drivers holding a 90% average over 30 days earned a bonus, and about a dozen teams of five competed each week for the highest team average, worth roughly $1,600 to each driver on the winning team.
Across an initial 12-week pilot phase with some 50 drivers, the average driving score rose from 77.0% to 84.8% and fuel economy improved by 3.5% at VA Transport. That is 4,226 gallons not burned, and about $17,000 US saved in three months. Twelve weeks is an early read: fuel savings from the ISAAC Fuel Coach typically keep building as coaching habits take hold, with fleets approaching the 5% mark over longer stretches.
On the safety front, VA Transport reduced harsh braking and turns by half, which also slows wear on brakes, tires, and drivetrains, saving more costs.
The team contest created a pleasant surprise and caught VA Transport’s safety director off guard when drivers began stopping by his office to check their teammates’ scores, not just their own, to trade tips and pull up the team average.
Conclusion: The driving saves the fuel, the score makes it repeatable
Fuel is the cost line that moves fastest when driver behavior changes. Moving that cost line requires no new routes, no lighter loads, and no newer trucks. Instead, it takes only two things: something in the cab telling the driver when the truck is burning more fuel than the conditions call for, and a score fair enough that drivers trust it.
See your fuel savings — request a personalized look at the ISAAC Fuel Coach
