Psychology says people who drive slowly in fast lanes, highways or expressways aren't always unaware of traffic. Some drivers may not notice vehicles approaching from behind, while others may remain in the lane because they believe they are driving within the speed limit. Some may feel uncomfortable changing lanes. Others may become focused on their own driving routine. This behaviour can affect traffic flow because vehicles behind them may have to slow down, change lanes or pass from another lane. Psychology offers several ways to understand this behaviour, including psychological reactance, moral licensing, automatic thinking, anxiety and lack of spatial awareness.
