While travelling on a road outside a built-up area, you were about to overtake a truck. After you turned on your left direction indicator, the driver of the truck turned on and then turned off the left direction indicator. What might this mean?

• 1The driver of the truck, in violation of the Road Traffic Rules, is hindering the overtake.
• 2The driver of the truck is warning you of a danger during the overtake that you are unable to detect.
• 3The driver of the truck was about to make a overtake himself but, upon seeing your actions, abandoned his plan.