TSL-ESCHA’s door indicator light PL13 is used in the interior of rail vehicles in the door cove. It is an information and signal light. PL13’s enhanced visibility offers passengers more safety and comfort when boarding and alighting buses and trains. The door indicator light PL13 features four luminous colors. Blue indicates a stop request for physically disabled persons, of which the driver is also informed. A green light indicates a normal stop request. Red warns about the current status of the door and yellow indicates a defective door. The light thus perfectly informs passengers about the door status. The door that will open can even be indicated before the stop on bidirectional vehicles, thereby speeding up boarding and alighting.