Posted By Frank Hallett
Keep it very, very simple! Just try to put youself in the drivers position of being in a [very] strange country with very limited local vocabulary. I would generally consider the use of hand-held translators to be better as the support mechanism rather than the initial interaction.

Clear signage positioned so that the driver on either isde of the cab can see it is a must; but remember that a sign that you design may not convey the message that you think it does. Signage should also be positioned so that there isn't too much information presented in one go [they are driving lorries!] and nor does it obscure other esential information.

One way systems, printed sign-boards with clear instructions and an MFI/IKEA type idiot guide for every movement will minimise the need for any uncontrolled activity out of the cab.

Frank Hallett