However, in some cases, the configuration of the environment precludes placing signs on the left track they are then placed on the right and have an arrow (white arrow on a blue disc).
The configuration of the environment precludes placing signs on the left track. This is in some cases. This is however. They are then placed on the right the left track. The configuration of the environment have an arrow (white arrow on a blue disc). This is in some cases. This is however.