tmdd1

Traffic Management Data Dictionary

Section 1 - Traffic Data Partition

Entities: LINK, NODE

Version: 1.4 October 30, 1998

Descriptive Name:

LINK_LevelOfService_code

Descriptive Name Context:

Manage Traffic

Definition:

A qualitative measure describing operational conditions within a traffic stream and

their perception by motorists and/or passengers as defined in the Highway

Capacity Manual.

Class Name:

Traffic Data

Classification Scheme Name:

IEEE P1489, Annex B

Classification Scheme Version:

19980706, V0.1.0

Keyword:

Level of Service

ASN1 Name:

Link-level-of-service

Data Type:

IA5 String

Representation Class Term:

Code

Value Domain:

characters

Valid Value

Valid Value List: A=Free flow conditions, B=Stable flow with

noticeable decline in free flow conditions, C=Stable flow with significant

increase in driver discomfort, D=High Density but stable flow,

E=Conditions near capacity level, F=Forced or breakdown flow

Representation Layout:

SIZE (1..1)

Remarks:

This level of service is derived as defined in the FHWA Highway

Capacity Manual. Refer to Sections 1,3,4,5,7,8,9,10, and 11.

V1.2 - Changed Representation Class Term to Code.

V1.3 - Changed Data Type to IA5 String.

Data Concept Identifier:

3017

Data Concept Version:

V1.3

Submitter Organization Name:

TMDD

Last Change Date:

19981015

3017

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