Sec.2 - Definitions

The American Association of State Highway and Transportation Officials.
Americans with Disabilities Act
American Traffic Safety Services Association
Access Management
The process of developing, providing and managing reasonable access while preserving the flow of traffic and maintaining safety, capacity, and proper speed on the roadway system.
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.
Certified Survey
MCL 525.201 (Public Act 132 of 1972 as amended).
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.
Complete Streets
A transportation policy and design approach that requires streets to be planned, designed, operated, and maintained to enable safe, convenient and comfortable travel and access for users of all ages and abilities regardless of their mode of transportation. Complete Streets allow for safe travel by those walking, bicycling, driving or occupying all categories of licensed motor vehicles (passenger cars & trucks), or riding public transportation.
Condominium Act
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.
Deceleration Lane
A lane, including a taper, constructed for the purpose of enabling a vehicle to leave the through traffic lane at a speed equal to or slightly less than the speed of traffic in the through lane and then decelerate to a stop or execute a slow-speed turn.
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.
Drainage District
Drainage areas wholly within one county can be established as County Drainage Districts per rules and regulations of the Washtenaw County Water Resources Commissioner’s Office.
Any lane, road, or other way providing vehicular access to or from a public road from or to the property adjoining the road.
A right of way granted, but not dedicated, for specific and limited use of private land.
Engineering Department
The unit of WCRC responsible for administering the process of developing proposed public roads within developments.
Environmental Protection Agency.
The current Federal-Aid Urban Boundary in Washtenaw County as approved by MDOT and FHWA.
The Federal Highway Administration.
Franchise Utility
A public utility company, recognized by the Michigan Public Service Commission, which provides service or distribution for telecommunication, natural gas, petroleum, electricity, or cable television.
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.
The private property that abuts the road right-of-way.
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
Institute of Transportation Engineers.
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.
Low Impact Design.
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.
Michigan Compiled Laws.
The Michigan Department of Environmental Quality.
The Michigan Department of Transportation.
The Michigan Manual of Uniform Traffic Control Devices.
The Michigan Manual of Uniform Traffic Control Devices.
Municipal Separate Storm Sewer System.
National Functional Classification
A system used to group public roadways into classes according to their purpose in moving vehicles and providing access.
National Pollutant Discharge Elimination System.
A map or chart of a subdivision of land.
Portland Cement Concrete
WCRC Procedures & Regulations for Permit Activities.
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.
Private Road
A road that is NOT certified by WCRC as a public road and therefore is outside the jurisdiction of WCRC. Typically serves four or more businesses, homes, or lots.
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.
Property Owner
A person, firm, association, partnership, corporation, or combination of any of these or any other party having an ownership interest in land.
Reverse Frontage
Frontage on an access road constructed at the rear of lots fronting on a major roadway.
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.
Right-of-way, see above.
A way for vehicular traffic, whether designated as a “street”, “highway”, “thoroughfare”, “freeway”, “expressway”, “parkway”, “through-way”, “avenue”, “boulevard”, “lane”, “cul-de-sac”, “drive”, “court”, or other title including the entire area within the right-of-way.
Road Construction
The act or process of building a road.
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.
Special Assessment District: A designated area where a majority of property owners agree to allow a government agency to levy a special property tax in exchange for a specific service such as the improvement of public roads. There are two pertinent SAD statutes: MCL 41.271 et seq. (Public Act 246 of 1931 as amended), which is administered by the Road Commission, and MCL 41.721 et seq. (Public Act 188 of 1954 as amended), which is administered by a Township.
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.
Sight Triangle
An area of unobstructed sight distance along both approaches of an access connection.
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.
Transportation Research Board.
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.
Traffic Impact Study (TIS)
Analysis of the potential traffic impacts generated by a proposed project on intersection level-of-service and the safety and operation of the public road system, as prepared by a Professional Engineer.
The Washtenaw Area Transportation Study.
The Washtenaw County Road Commission.
Washtenaw County Water Resources Commissioner’s Office
Permission to depart from a regulatory standard where required conditions are satisfied.

Procedures & Regulations for Developing Public Roads, effective August 6, 2014