Page 233 - TransportationPlanUsetsGuide

Inter-agency Coordinating Committee (ICC) – A technical committee consisting of representatives from cities
in Washington County, Tualatin Hills Park & Recreation District, TriMet, Metro, Port of Portland and Oregon
Department of Transportation, that provided input and advice during the development of the TSP and consid-
ered the policy implications within the jurisdictions they represent.

Intermodal facility – A transportation element that allows passenger and/or freight connections between
modes of transportation. Examples include airports, rail stations, marine terminals, and railyards that facili-
tate the transfer of containers or trailers.

Joint Policy Advisory Committee on Transportation – A committee of elected officials and representatives
of agencies involved in transportation that make recommendations to the Metro Council on transportation
needs in the Portland metropolitan region.

Lane numbers – The maximum number of vehicle travel lanes that can be built without a plan amendment
as identified on the Road Lane Numbers Map in the TSP, and as subject to certain exceptions related to turn
lanes and auxiliary lanes.

Level of Service (LOS) – A qualitative measure describing the operational conditions of a particular transporta-
tion facility or service based on the perception of users, and sometimes supported by quantitative measures. Mo-
tor vehicle LOS describes roadway operating conditions in terms of such factors as speed, travel time, freedom
to maneuver, traffic interruptions, comfort, convenience and safety. A letter score of ‘A’ through ‘F’ is assigned
based on these conditions. For motor vehicle LOS, the scores represent the following conditions on a roadway:
A. Virtually free flow; completely unimpeded ADOPTED TEXT

B. Stable flow with slight delays; reasonably unimpeded
C. Stable flow with delays; less freedom to maneuver
D. High Density but stable flow

E. Operating conditions at or near capacity; unstable flow
F. Forced flow, breakdown conditions

LOS can be applied to other modes as well, including pedestrian LOS, bicycle LOS and transit LOS.

Local Improvement District (LID) – A method by which a group of property owners can share the cost of
transportation infrastructure improvements such as building sidewalks. LIDs are typically created on a volun-
tary basis with the agreement of the majority of affected property owners. The cost of the improvements is
split among these owners and typically assessed on property tax bills.

Local Street – Local Streets primarily provide direct access to adjacent land. While Local streets are not
intended to serve through traffic, the aggregate effect of local street design impacts the effectiveness of the
Arterial and Collector system when local travel is restricted by a lack of connecting routes, and local trips are
forced onto the Arterial street network. In the urban area, local roadway system designs often discourage
“through traffic movement”, however, in the rural area local roads are sometimes the only facilities available
for access to dispersed rural land uses.

APPENDICES 213
Effective November 27, 2015 • Updated December, 15 2016