Abstract: A transport vehicle includes at least one antenna, at least one satellite positioning receiver configured to receive positional information via the antenna, at least one antenna support member including an antenna attachment portion with the antenna attached thereto and a vehicle body connector connected to the vehicle body, and a vehicle position estimator configured to estimate a vehicle position of the transport vehicle using the positional information received by the satellite positioning receiver. The antenna support member is configured to move between at least one use state, in which the antenna is disposed at at least one use position at a predetermined distance above a loading surface of the cargo bed, and a stored state in which the antenna is disposed below the use position.

Abstract: A heavy goods vehicle includes a displacement calculator that calculates a displacement by multiplying an arc length per unit rotation angle of the outer circumference of a specified tire by the first physical quantity, a vehicle position estimator that estimates a vehicle position using the displacement, and a memory that stores a correlation between a second physical quantity corresponding to a loading weight and an arc length per predetermined rotation angle at the outer circumference of the specified tire. The displacement calculator refers to the correlation to calculate a current arc length per unit rotation angle at the outer circumference of the specified tire from the second physical quantity corresponding to the loading weight, and calculates the displacement by multiplying the first physical quantity detected by the rotation amount detector by the current arc length per unit rotation angle.

Abstract: A vehicle: finds a common central point at which a difference between a distance from a current position of a first tire and a distance from a target position of the first tire is within a predetermined range and a difference between a distance from a current position of a second tire and a distance from a target position of the second tire is within a predetermined range; and sets a steering angle of each of a plurality of tires so that the tire will be oriented in a direction of a tangent to a clearance circle whose center is the common central point or oriented in a direction whose angle difference from the direction of the tangent is within a predetermined range.

Abstract: A vehicle: finds a common central point at which a difference between a distance from a current position of a first tire and a distance from a target position of the first tire is within a predetermined range and a difference between a distance from a current position of a second tire and a distance from a target position of the second tire is within a predetermined range; and sets a steering angle of each of a plurality of tires so that the tire will be oriented in a direction of a tangent to a clearance circle whose center is the common central point or oriented in a direction whose angle difference from the direction of the tangent is within a predetermined range.

Abstract: A transport vehicle includes at least one antenna, at least one satellite positioning receiver configured to receive positional information via the antenna, at least one antenna support member including an antenna attachment portion with the antenna attached thereto and a vehicle body connector connected to the vehicle body, and a vehicle position estimator configured to estimate a vehicle position of the transport vehicle using the positional information received by the satellite positioning receiver. The antenna support member is configured to move between at least one use state, in which the antenna is disposed at at least one use position at a predetermined distance above a loading surface of the cargo bed, and a stored state in which the antenna is disposed below the use position.

Abstract: A heavy goods vehicle includes a displacement calculator that calculates a displacement by multiplying an arc length per unit rotation angle of the outer circumference of a specified tire by the first physical quantity, a vehicle position estimator that estimates a vehicle position using the displacement, and a memory that stores a correlation between a second physical quantity corresponding to a loading weight and an arc length per predetermined rotation angle at the outer circumference of the specified tire. The displacement calculator refers to the correlation to calculate a current arc length per unit rotation angle at the outer circumference of the specified tire from the second physical quantity corresponding to the loading weight, and calculates the displacement by multiplying the first physical quantity detected by the rotation amount detector by the current arc length per unit rotation angle.