Mainstreaming, inclusion: The inclusion of people with disabilities, with or without special accommodations, in programs, activities, and facilities with their non-disabled peers.

Major life activities: Functions such as caring for oneself, performing manual tasks, walking, seeing, hearing, speaking, breathing, learning, working, and participating in community activities (from the Americans with Disabilities Act of 1990).

Maximum cross-slope: The highest cross-slope of a trail or sidewalk that exceeds the typical running cross slope of the path. The distance over which a maximum cross slope occurs significantly influences how difficult a section of sidewalk or trail is to negotiate.

Maximum grade: The steepest grade that exceeds the typical running grade. The distance over which a maximum grade occurs significantly influences how difficult a section of sidewalk or trail is to negotiate.

Median: An island in the center of a road that provides pedestrians with a place of refuge and reduces the crossing distance between safety points.

Metropolitan Planning Organization (MPO): An urban regional body for areas with populations larger than 50,000, that makes transportation policy and planning decisions as mandated in Federal transportation legislation.

Midblock crossing: A crossing point positioned in the center of a block rather than at an intersection.

Minimum clear width: The narrowest point on a sidewalk or trail. A minimum clear width is created when significant obstacles, such as utility poles or tree roots, protrude into the sidewalk and reduce the design width.

Mobility device: see next page for discussion and examples.

Mobility impairment: Disability that affects movement ranging from gross motor skills such as walking to fine motor movement involving manipulation of objects by hand.

Mouse emulation: A method of having an alternative device and/or software, such a switch based system, serve the role of a mouse.

Multimedia: In terms of electronic information, any data which is presented through several formats including text, graphics, moving pictures and sound.

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