Deadhead: The Miles Passengers Never See

Not every mile a transit bus travels carries passengers. Deadhead movements connect garages, routes, terminals, and assignments, and although they never appear in the public timetable, they consume time, mileage, fuel, electricity, and operating resources.

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A passenger sees a bus drive past with the destination sign displaying Not in Service.

A reasonable question is:

Why is an empty bus driving around when passengers are waiting for service?

Sometimes that bus is exactly where it needs to be.

It may be deadheading.

What Is Deadhead?

Deadhead is non-revenue travel performed by a transit vehicle.

Common examples include:

• Garage to the first trip
• Final trip back to the garage
• One route terminal to another route
• A vehicle traveling to replace another bus
• Movement to or from a fueling or charging location

Passengers generally cannot ride during these movements.

Pull-Out and Pull-In

The first deadhead of the day is often associated with pull-out.

The bus leaves the operating facility and travels to the location where its first passenger trip begins.

At the end of its work, the vehicle pulls in to the garage.

Those miles are necessary to operate the service even though they do not appear in the passenger timetable.

Geography Makes a Difference

Deadhead becomes particularly important in large service areas.

If a route begins 25 miles from the operating facility, the agency has to move a bus and operator those 25 miles before the first passenger ever boards.

The same thing happens at the end of the day.

That means the location of the garage can have a substantial effect on operating cost.

Deadhead Between Routes

Blocks may contain more than one route.

Suppose a bus finishes Route A at 10:30 and begins Route B at 10:50 several miles away.

The schedule must include enough deadhead time for the bus to make that movement.

If it does not, the second assignment is impossible.

This is one reason planners cannot simply connect trips based on their clock times.

Location matters just as much.

Deadhead Costs Money

An empty bus still uses:

• Operator time
• Fuel or electricity
• Tires
• Maintenance
• Vehicle mileage
• Road time

Reducing unnecessary deadhead can make a schedule more efficient.

But eliminating all deadhead is impossible.

The goal is to minimize it without damaging the service.

The Closest Trip Is Not Always the Best Connection

A scheduler may discover that connecting two nearby trips reduces deadhead but creates another problem.

Perhaps the connection:

• Provides inadequate recovery
• Requires the wrong vehicle type
• Creates a terminal conflict
• Spreads lateness between routes

Efficient blocking requires looking at the entire assignment.

Sometimes a few extra deadhead miles produce a much more reliable block.

Electric Buses Add Another Consideration

Battery-electric buses make deadhead mileage particularly important.

Every non-revenue mile still uses energy.

A block that appears comfortably within a vehicle's range when only revenue mileage is considered may become much tighter after pull-out, pull-in, and other non-revenue movement are included.

Planners therefore need to evaluate total block mileage.

Passengers Rarely See This Part of the Schedule

The public timetable might show eight hours of passenger service.

The bus itself may work longer.

It might spend:

• 20 minutes reaching its first route
• 15 minutes moving between assignments
• 25 minutes returning to the garage

Those movements are invisible to the passenger but very real to the operating plan.