Estes Express Lines Transportation Glossary

Transportation Glossary (PDF)

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H

HAWB:

See House Air Waybill.

Hazardous Materials (Hazmat):

The Transportation Safety Act of 1974 defines hazardous material as: "a substance or material in quantity and form which may pose an unreasonable risk to health and safety or property when transported in commerce."

Hazmat Regulations:

Standards set by the Research and Special Programs Administration (RSPA) Office of Hazardous Materials Transportation (OHMT) that regulates how hazardous materials are shipped.

Head Haul:

The term used to define the highest revenue-generating shipping lane from shipper to consignee. Opposite of backhaul.

Head Load:

First load used to start a trailer.

High Value Freight:

Freight that has a value exceeding the limitations set in the EXLA 105 series rules tariff.

HOS:

See Hours of Service.

Hostler:

An individual employed to move trucks and trailers within a terminal or warehouse yard area. See yard jockey.

Hours of Service (HOS):

A ruling that stipulates the amount of time a driver is allowed to work enforced by the Federal Motor Carrier Safety Administration. On January 4, 2004, the HOS rule was changed from a driver being allowed to drive for 10 hours and break for 8 consecutive hours with 15 hours on duty in a day to the current rule of driving for 11 hours and breaking for 10 consecutive hours with 14 hours on duty.

House Air Waybill (HAWB):

A shipper-to-consignee air waybill. The forwarding agent’s air waybill; not valid for transportation for the carrier. HAWB conditions are contracted between the agent and the shipper and do not concern the carrier. Also see Airbill.

Hub:

A terminal in the center of a region where freight can be loaded and unloaded to accomplish next-day delivery.

Hundred Weight:

See CWT.

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