(11)

Business Segments

We aggregate our

five

current operating segments into

four

reporting segments (Truckload, Dedicated, Intermodal and Brokerage) for financial reporting purposes.

The primary source of our operating revenue is provided by our Truckload segment through a combination of regional short-haul and medium-to-long-haul full-load transportation services. We transport food and other consumer packaged goods that require a temperature-controlled or insulated environment, along with dry freight, across the United States and into and out of Mexico and Canada.

Our Dedicated segment provides customized transportation solutions tailored to meet individual customers’ requirements, utilizing temperature-controlled trailers, dry vans and other specialized equipment within the United States. Our customer contracts range from

three

five

years and are subject to annual rate reviews.

Our Intermodal segment transports our customers’ freight within the United States utilizing our temperature-controlled trailers on railroad flatcars for portions of trips, with the balance of the trips using our tractors or, to a lesser extent, contracted carriers.

Our Brokerage segment develops contractual relationships with and arranges for

third

-party carriers to transport freight for our customers in temperature-controlled trailers and dry vans within the United States and into and out of Mexico through Marten Transport Logistics, LLC, which was established in

2007

and operates pursuant to brokerage authority granted by the DOT. We retain the billing, collection and customer management responsibilities.

The following table sets forth for the periods indicated our operating revenue and operating income by segment. We do not prepare separate balance sheets by segment and, as a result, assets are not separately identifiable by segment.

	Three Months
	Ended March 31,
( Dollars in thousands )	2017		2016
Operating revenue:
Truckload revenue, net of fuel surcharge revenue	$	84,811	$	82,942
Truckload fuel surcharge revenue		10,847		7,112
Total Truckload revenue		95,658		90,054

Dedicated revenue, net of fuel surcharge revenue		36,899		35,510
Dedicated fuel surcharge revenue		3,378		1,587
Total Dedicated revenue		40,277		37,097

Intermodal revenue, net of fuel surcharge revenue		16,811		15,854
Intermodal fuel surcharge revenue		2,375		1,347
Total Intermodal revenue		19,186		17,201

Brokerage revenue		18,038		17,577
Total operating revenue	$	173,159	$	161,929

Operating income:
Truckload	$	5,974	$	6,940
Dedicated		4,487		4,324
Intermodal		2,149		1,929
Brokerage		1,328		932
Total operating income	$	13,938	$	14,125

Truckload segment depreciation expense was

$14.6

million and

$13.7

million, Dedicated segment depreciation expense was

$5.3

million and

$5.0

million, Intermodal segment depreciation expense was

$1.1

million and

$941,000,

and Brokerage segment depreciation expense was

$334,000

and

$481,000,

in the

three

-month periods ended

March

31,

2017

and

2016,

respectively.