Sec.2 - Definitions

The American Association of State Highway and Transportation Officials.
Agreement for Public Road Development
An agreement executed by the Developer and the WCRC that describes certain construction and financial obligations of the Developer and the intention of the WCRC to accept the new roads as public roads provided those obligations be met.
A major roadway intended primarily to serve through traffic, where access is carefully controlled; generally roadways of regional importance, intended to serve moderate to high volumes of traffic traveling relatively long distances and at higher speeds.
A mound of earth with sloping sides that is located between areas of approximately the same elevation.
The Board of County Road Commissioners of the County of Washtenaw.
Clear Vision Area
Land acquired or used by the WCRC for maintaining unobstructed vision.
Collector Road
A road intended to move traffic between local roads and arterial roads.
Condominium Act of 1978
Act 59 of the Michigan Public Acts of 1978, as amended.
Condominium Unit
The portion of a condominium project designed and intended for individual ownership and use. County Highway Engineer – The Director of Engineering or other representative designated by the Board of County Road Commissioners.
A road open at one end only that includes a special turning area at the closed end; also referred to as a dead-end road.
Design Engineer
Refer to Professional Engineer
Design Speed
The speed used to determine the various geometric design features of the roadway.
Design Spread
The accumulated flow in and next to the roadway gutter. This water often represents an interruption to traffic flow during rainstorms measured by lateral distance, in feet, of roadway ponding from the curb.
A natural person, firm, association, partnership, corporation or combination of same which holds ownership interest in land upon which a plat, condominium or other development is planned.
A right of way granted, but not dedicated, for specific and limited use of private land.
The current Federal-Aid Urban Boundary in Washtenaw County as approved by MDOT and FHWA.
The Federal Highway Administration.
Final Plat
An exact and detailed map of all or part of a subdivision prepared and certified by the Developer’s Professional Surveyor in accordance with the requirements of the Land Division Act, Act 288 of the Public Acts of 1967, as amended.
Governing Body
Township Board, City Council, or Village Board having jurisdiction over the land in which a subdivision is to be located.
Hot Mix Asphalt
The close observation and examination of various construction operations and products as a means of determining the acceptability of completed roads and appurtenant structures.
Land Division Act
Act 288 of the Michigan Public Acts of 1967, as amended.
Local Road
A roadway with the primary function of providing access to adjacent properties and to roadways of a higher functional classification.
A measured portion of a parcel or tract of land, which is described and fixed in a recorded plat.
Michigan Coordinate System
the system defined in Act 9 of the Public Acts of 1964, as amended, being sections 54.231 to 54.239 of the Michigan Compiled Laws.
The Michigan Department of Environmental Quality.
The Michigan Department of Transportation.
The Michigan Manual of Uniform Traffic Control Devices.
Functional Classification
A system used to group public roadways into classes according to their purpose in moving vehicles and providing access.
A map or chart of a subdivision of land.
Portland Cement Concrete
Preliminary Plan
In the case of proposed land division developments or condominium projects, a preliminary plan is analogous to and will be treated as a preliminary plat as described herein.
Preliminary Plat
A map showing the salient features of a proposed subdivision submitted to an approving authority for purposes of preliminary consideration.
Professional Engineer
The licensed, professional engineer employed by the Developer of a plat or other subdivision development to prepare plans and supervise inspection of the roads in the development area. The Professional Engineer is referred to as the Design Engineer during the preliminary engineering phase and as the Construction Engineer during the construction phase. A civil engineer who is a professional engineer licensed under Article 20 of the occupational code, Act 299 of the Public Acts of 1980, being sections 339.2001 to 339.2014 of the Michigan Compiled Laws.
Professional Surveyor
The licensed professional surveyor employed by the Developer to prepare preliminary and final plats of the roads in the subdivision development. A professional surveyor licensed under Article 20 of the occupational code, Act 299 of the Public Acts of 1980, being sections 339.2001 to 339.2014 of the Michigan Compiled Laws.
Reverse Frontage
Frontage on an access road constructed at the rear of lots fronting on a major roadway.
Right of Way
The land over which the Washtenaw County Road Commission has jurisdiction and which is subject to use for road and drainage purposes. Right of way may be obtained by deed, statutory or plat dedication or condemnation. It may be held either in fee or may be an easement.
Road & Drainage Plan
The land over which the Washtenaw County Road Commission has road jurisdiction and which is subject to use for public road and drainage purposes. Right of way may be obtained by deed, statutory or plat dedication, condemnation or by a ten-year period of use. It may be held either in fee or may be an easement.
The Subdivision Advisory Committee.
The Southeast Michigan Council of Governments.
Sight Distance
The length of clear view along a roadway required so that a specified object is visible to the driver of a specified design vehicle.
Storm Sewer
A closed or open conduit that conveys stormwater that has been collected by inlets to an adequate outfall. It generally consists of laterals or leads, and trunklines or mains. Culverts connected to the storm sewer are considered part of the system.
A division of land as described in the Land Division Act or the Condominium Act.
Subdivision Section
The unit of the Engineering Department of the WCRC tasked with administering the process of developing proposed public roads within subdivisions.
Traffic Control Plan
A plan identifying all required traffic control devices, including but not limited to signs, barriers, barricades, plastic drums, lights and pavement markings, in accordance with the current MMUTCD.
Urban Area
The urban area in Washtenaw County is based on the current Federal-Aid Urban Boundary as determined by MDOT and FHWA.
The Washtenaw Area Transportation Study.
The Washtenaw County Road Commission.

Procedures & Regulations for Developing Public Roads, effective October, 19 2004