<P> Overtaking on the inside or undertaking refers to the practice of overtaking a slower vehicle on a road using the lane that is kerb side of the vehicle being passed ; that is to say , a lane to the left of the vehicle in countries where driving is on the left , or a lane to the right of the vehicle in countries where driving is on the right . The practice of passing on the inside , therefore , usually only occurs on a motorway or other road where there is more than one lane in the same direction or when the width of the roads makes this possible ( although there may be exceptions in the cases of contraflow bus lanes ) . </P>
<P> Overtaking on the inside or undertaking refers to the practice of overtaking a slower vehicle on a road using the lane that is kerb side of the vehicle being passed ; that is to say , a lane to the left of the vehicle in countries where driving is on the left , or a lane to the right of the vehicle in countries where driving is on the right . The practice of passing on the inside , therefore , usually only occurs on a motorway or other road where there is more than one lane in the same direction or when the width of the roads makes this possible ( although there may be exceptions in the cases of contraflow bus lanes ) . </P>
which is the inside lane on a road
which is the inside lane on a road
a lane to the left of the vehicle in countries where driving is on the left a lane to the right of the vehicle in countries where driving is on the right
a lane to the left of the vehicle in countries where driving is on the left a lane to the right of the vehicle in countries where driving is on the right