The present invention monitors a vehicle's normal axle path of movement during vehicle operation when the axle is aligned perpendicular to the vehicle's geometric centerline. An onboard computer (82) stores normal axle motion values which are determined by an arm or line segment (28) having a first end originating at axle (58) and a second end of line segment (28) ending on segmented sensing plane (40) mounted adjacent to axle (58). Upon axle deviation, axle (58) moves outside of the normal axle...

A method and system for guiding a vehicle through a tunnel or other space. A linear beam of light is projected along a certain path through the space. As the vehicle travels into the space, the linear beam is shined upon the vehicle. Visually aligning an indicator on the vehicle with the linear beam of light indicates to the driver that the vehicle is traveling directly down the center of the path. The alignment occurs by the driver making manual adjustments of the vehicle's direction by turning...

A device for guiding alignment in trailer hitching with a trailer cup attachment and a towing vehicle attachment. The trailer cup attachment adjustably clips over the trailer cup on the drawbar of the trailer. The trailer cup attachment has at least one vertical rod and an alignment indicator equipped with guide lights and a sound generator to indicate when the ball on the towing vehicle is in hitching position relative to the trailer cup. The towing vehicle attachment has a mounting base for re...

A horizontal scale is attached to the rear window of a motor vehicle to align either with a particular element on a towed vehicle or with a scale attached to such vehicle so that the driver can accurately back the towing vehicle for hooking-up with the towed vehicle and for backing the latter in a straight line or at an angle as indicated by the scale. Similar scales are also attachable to an inside rear view mirror or to the outside rear view mirrors of a tractor to provide guide means for the ...

The invention provides visual guide means for use on vehicles, namely, sighting members in the line of view between the driver and painted lane stripes by which a driver can with assurance maintain the vehicle properly within a lane. Such sighting members are similar to open top target sights but of much larger dimension and provided with attachment means to be secured to forwardly extending portions of a vehicle, such as hood or fenders, or to the windshield, depending on type of vehicle. The s...

Concave lens elements are formed in a sheet of plastic in the form of letters or the like and are filled in with transparent plastic. A backing of embossed and metallized plastic sheet is provided for light-reflecting purposes. An intermediate colored and transparent sheet can also be employed to color the reflected light.

Disclosed is a surveying method and apparatus including a self-powered mobile target rod carrier and rotatable target rod with calibrated means for measuring horizontal angles. The mobile vehicle also includes a retractable table for placing gravity measuring equipment on the terrain at the data point and determining the elevation of the target above the point at which the data is taken.

A Collision Risk Assessment System employs a plurality of sights located in front of and to the rear of a vehicle which may be an automobile, boat, plane etc. The sights may be in groups of three sights allowing the vehicle's operator to locate the center and the sides of the vehicle to the front and rear relative to the roadway, waterway, etc. The sights are laterally adjustable and are illuminated. The lateral adjustment permits the sights to be located as a function of the size of the vehicle...

A trailer hitch alignment device includes a pointer assembly for mounting to a rear portion of a vehicle and a target assembly for mounting to the tongue of a trailer in order to align a towing ball on the vehicle with the socket portion of a trailer hitch mounted to the tongue of the trailer. The pointer assembly, including an elongated pointer and mounting means for mounting the pointer to the rear portion of a vehicle, is configured to accommodate virtually all vehicles. The target assembly i...

A lane marker steering guide attachable in close proximity to the surface of the windshield of a vehicle or its dash panel including a single sight member connected to means for attaching the steering guide to the inner surface of the windshield or its dash panel. The upper portion of the sight member is arrow-shaped and upwardly pointing when installed and includes an opaque or translucent layer on the upper portion of the otherwise transparent sighting member. The attaching means is also prefe...