Method of designing a driver's compartment

A method of designing a driver's compartment for accommodating a predetermined range of driver's sizes comprising a smallest size and a largest size, the compartment having a floor and a top end, the method including:

• a. designing a driver's seat having a seat reference point (SRP) used to define a position of a corresponding part of the seat in the compartment and a seat pan height reference point (SPHRP) used to define a position of the front portion of the seat in the compartment;
• b. providing a seat moving mechanism configured to move at least the SRP vertically in the compartment between a first position in which the SRP is disposed at a first vertical distance H1 from the top end and the SPHRP is disposed at a vertical distance of H3 from the floor, and in which the seat is configured to accommodate a driver of the smallest size, and a second position in which the SRP is disposed at a second vertical distance H2 from the top end, and the SPHRP is disposed at another vertical distance of at most H3 or less from the floor, H2 being greater than H1 and in which the seat is configured to accommodate a driver of the largest size;
• c. disposing the top end at a vertical distance H4 from the floor, the distance H4 corresponds to the sum of H1 and H3, so that the vertical distance H4 of the top end is suitable for accommodating the driver of the largest size only when the seat is in the second position;
• and
• d. limiting a vertical dimension of a front window of the driver's compartment such that a vision cone of the driver of the smallest size in the first position is encompassed by a vision cone of the driver of the largest size in the second position.