Customers and Marketing
We seek to establish long-term relationships with our customers and to increase the amount of business done with each customer by providing them with a full range of logistics services. During 2008, we served over 32,000 customers worldwide, ranging from Fortune 100 companies to small businesses in a wide variety of industries. During 2008, no customer accounted for more than six percent of gross revenues or three percent of gross profits. In recent years, we have grown by adding new customers and by increasing our volumes with, and providing more services to, our existing customers.
We believe that our decentralized structure enables our salespeople to better serve our customers by developing a broad knowledge of logistics and local and regional market conditions, as well as the specific logistics issues facing individual customers. With the guidance of experienced branch managers (who have an average tenure of 11 years with us), branches are given significant latitude to pursue opportunities and to commit our resources to serve our customers.
Branches seek additional business from existing customers and pursue new customers based on their knowledge of local markets and the range and value of logistics services that we can provide. We have also expanded our national sales and marketing support to enhance branch sales capabilities. Branches also call on our executives, our corporate sales staff, and a central logistics group to support them in the pursuit of multinational corporations and other companies with more complex logistics requirements.
Relationships with Transportation Providers
We continually work on establishing relationships with qualified transportation providers that also meet our service requirements to assure dependable services, favorable pricing, and carrier availability during periods when demand for transportation equipment is greater than the supply. Because we do not own any transportation equipment or employ the people directly involved with the delivery of our customers freight, these relationships are critical to our success.
As of December 31, 2008, we had worked with approximately 50,000 transportation providers worldwide, of which the vast majority are motor carriers. To strengthen and maintain our relationships with motor carriers, our salespeople regularly communicate with carriers and try to assist them by increasing their equipment utilization, reducing their empty miles, and repositioning their equipment. To make it easier for carriers to work with us, we have a policy of prompt payment upon receipt of proof of delivery. For those carriers who would like a faster payment, we also offer payment within 48 hours of receipt of proof of delivery in exchange for a discount, along with offering in-trip cash advances through our T-Chek subsidiary.
These motor carriers provide access to temperature controlled vans, dry vans and flatbeds. These carriers are of all sizes, including owner-operators of a single truck, small and mid-size fleets, private fleets, and the largest national trucking companies. Consequently, we are not dependent on any one carrier. Our largest truckload carrier was less than one percent of our total cost of transportation in 2008. Motor carriers that had fewer than 100 tractors transported approximately 75 percent of our truckload shipments in 2008. We qualify each carrier to make sure it is properly licensed and insured, has the necessary federally issued authority to provide transportation services, and that it has the resources to provide the necessary level of service on a dependable basis. Our motor carrier contracts require that the carrier issue invoices only to and accept payment solely from us, and allow us to withhold payment to satisfy previous claims or shortages. Our standard contracts do not include volume commitments, and the initial contract rate is modified each time we confirm an individual shipment with a carrier.
We also have intermodal marketing agreements with container owners, stacktrain operators, and all Class 1 railroads in North America, giving us access to additional trailers and containers. Our contracts with railroads specify the transportation services and payment terms by which our intermodal shipments are transported by rail. Intermodal transportation rates are typically negotiated between us and the railroad on a customer-specific basis.
In our non-vessel operating common carrier (NVOCC) ocean transportation and freight forwarding business, we have contracts with most of the major ocean carriers which support a variety of service and rate needs for our customers. We negotiate annual contracts that establish the predetermined rates we agree to pay our ocean carriers. The rates are negotiated based on expected volumes from our customers, specific trade lane requirements, and anticipated growth in the international shipping marketplace. These contracts are often amended throughout the year to reflect changes in market conditions for our business, such as additional trade lanes.
In our air freight forwarding business, we purchase transportation services from approximately 200 air carriers through charter services, block space agreements, and transactional spot market negotiations. Through charter services we contract part or all of an airplane to meet customer requirements. Our block space agreements are annual contracts that include fixed allocations for predetermined flights at agreed upon rates that are reviewed annually or throughout the year. The transactional negotiations afford us the ability to capture excess capacity at prevailing market rates for a specific shipment.