A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

A

Access Aisle
The painted region or concrete ramp adjacent to an Accessible Stall to allow disabled persons easier access to the accompanying accessible stall. An Access Aisle can be positioned to the right or to the left of an Accessible Stall, or it can be shared between Accessible Stalls.

Access Line

The line designating the boundary of the area intended for vehicles to navigate into and out of parking stalls and for driving between rows of stalls.

Accessible Stall
A parking stall that conforms to an Accessibility Standard such as ADA. These stalls are drawn with the International Symbol of Accessibility and an Access Aisle.

Aisle
The area immediately adjacent to the parking stalls which permits maneuvering of the vehicles entering and leaving a parking stall, and which connects the parking stalls to the driveway.

Aisle Width
The distance between the Access Line and the end of the Stall lines.

Articulating Angle
The angle between adjacent vehicle parts, such as between the tractor and trailer of a semitrailer vehicle.

C

Constant Pursuit
An approximate numerical method used to calculate the positions and orientations of the body of a vehicle and any trailing articulating components as it moves forward, given a starting position and the path to be followed by the vehicle's front axle.

D

Design Vehicle
A set of dimensions for a common vehicle which defines a standard used by a particular jurisdiction for typical road design conditions.

E

End Island
An area at the end of a parking Row.

Envelopes
Envelopes refer to the lines traced out by the selected vehicle elements or clearances from these elements (see Swept Path and Tire Tracks).

L

Lateral Friction
The side friction or Lateral Friction factor is the coefficient of friction between the vehicle's tires and the road surface. The friction value is assumed to decrease as the speed increases.

Layout
A stall Layout is a combination of three criteria - Vehicle Size, Parking Class, and Stall Angle - and the required values - stall length, stall width, and Aisle Width for one way aisle types or Aisle Width for two way aisle types.

Lock to Lock Time
The time in seconds that an average driver would take under normal driving conditions to turn the steering wheel of a vehicle from the lock position on one side, to the lock position on the other side.

M

Maneuver
A single section in a Turn Simulation. Section and Maneuver are synonymous.

Maximum Articulating Angle
The maximum angle that can occur between adjacent vehicle parts, such as between the tractor and trailer of a semitrailer. This angle is zero degrees when the parts are aligned.

Minimum Inner Turn Radius
The radius of the arc formed by the wheel closest to the center of the vehicle turn at its maximum Steering Lock Angle. If there is more than one axle in the last axle group, the Minimum Inner Turn Radius is based on the center of the axle group.

P

Painted Area
The surface area of the Parking Lot painted content. Painted Area includes the Stall lines, End Islands, and Accessible Stalls (the hatched area and wheelchair symbol). The length of all the lines is calculated and multiplied by the line width. Painted Area does not include the symbols inserted by using the Insert Symbol tool.

Parking Class
Parking class usually identifies typical stall widths associated with turnover/user characteristics.

Parking Lot
An area where vehicles may be left temporarily.

Parking Standards
A set of criteria established to define the design characteristics of a parking facility.

Pre-drawn Path
The vehicle path drawn using the CAD drawing tools (see General Toolbar Overview). For example, it could define a known, or best guess of the path that will be followed by the center of the front axle of the current vehicle.

Profile
The side view representation of a vehicle type used in dialog box previews and the Place Vehicle Profile in Drawing tool.

R

Row
A series of parking Stalls. Rows can be either single sided or double sided.

S

Section
A section is a single maneuver in a Turn Simulation. Section and Maneuver are synonymous.

Stall
A portion of a parking area indicated by signs, markings, or physical barriers as a parking space for a single vehicle.

Stall Angle
Stall Angle is measured between the center of the Row and the stall line. A Stall Angle usually ranges from 30 degrees to 90 degrees.

Stall Width
The distance measured perpendicularly between two stall lines.

Standard Vehicle
A vehicle definition supplied with the program (see also Design Vehicle).

Steering Lock Angle
The maximum angle the steering wheels can be turned. It is defined as the average of the angles made by the left and right steering wheels with the longitudinal axis of the vehicle when the wheels are turned to their maximum angle.

Superelevation
The angle, or bank of a road surface. It is expressed as a slope. For example, a superelevation of 0.01 is a one-percent slope, which rises 1 unit for every 100 units of horizontal distance. In AutoTURN Online, superelevation is limited to the range of -0.1 to 0.1.

Sweep Angle
The angle between the direction of travel and the exit tangent (new heading).

Swept Path
The swept path of a vehicle is the envelope swept out by the sides of the vehicle body, or any other part of the structure of the vehicle. A swept path determines whether the vehicle will make contact with vertical obstructions. Create a swept path simulation by selecting the Vehicle Body checkbox in the Envelopes category of the Simulation Display Settings dialog box.

T

Tire Tracks
A vehicle's tire tracks are the paths taken by the front and rear most tires. Create a tire track simulation by selecting the Front Tires and Rear Tires checkboxes in the Envelopes category of the Simulation Display Settings dialog box.

Track
The track of a vehicle is defined as the distance between the outside edges of the outermost tires on the left and right sides.

Turn Simulation
A turn simulation consists of a connected series of one or more vehicle maneuvers. The turn simulation comprises the path, the vehicle and the tire track or vehicle body envelopes.

V

Vehicle Size
The vehicle size is a classification of the general size of the vehicles intended to use the stalls in that layout. Most typically, the sizes are broken down into two categories, large and small. Sometimes a composite group is used to account for all vehicle sizes in one category.

W

Width
The width of a vehicle is defined as the distance between adjacent sides.