A multi-lamp type route indicator displays a route identifier by illuminating a pattern of light sources to form a number or letter. It works with the main signal and tells the driver which route has been selected by the signalling system.
The required display, control and proving are defined by the approved signalling design. A route indicator supplements the main signal aspect; it does not provide independent movement authority.
How the display is formed
Light sources are arranged in rows and columns so selected elements form the required character. Modern project schedules may describe LED units while older training material explains conventional lamp matrices. The applicable specification decides the supplied technology.
Where multi-lamp indicators fit
They are useful where the route needs to be identified by a number or letter and the approved sighting arrangement supports that display. Project documents may use them at junction stations or locations with multiple selectable routes.
Difference from stencil type
A stencil indicator illuminates a prepared character within a compartment. A multi-lamp indicator constructs the character from individual light points, allowing a different display architecture and proving arrangement.
Difference from junction type
A junction indicator communicates direction using a spatial row or arm arrangement. A multi-lamp indicator communicates a number or alphabetic route identifier.
Procurement information
List every required character, single- or double-digit format, housing and mounting, applicable specification, electrical interface, proving compatibility, visibility requirement and inspection documents.
Project checklist
- Every required route display
- Lamp or LED matrix configuration
- Housing and mounting drawing
- Electrical supply and proving interface
- Sighting and visibility inputs
- Inspection and identification
Review the route indicators product page for the related Principal Vinimay catalogue item and enquiry path.
Continue with the railway route-indicator guide for supporting context.
Use the approved project documents
This article explains terminology, interfaces and procurement questions. The latest approved railway rules, drawings, specifications and project instructions remain the controlling requirements for design, installation, testing and operation.
Frequently asked questions
What does a multi-lamp route indicator display?
It forms an approved number or letter using multiple light sources to identify the selected route.
Is a multi-lamp indicator the same as a junction indicator?
No. A junction indicator primarily communicates direction; a multi-lamp indicator forms a number or character.
Can any route number be programmed?
The supplied and permitted displays depend on the approved equipment specification, design and control arrangement.
References and further reading
- Selection Circuits and Control Tables — Route Indicators — IRISET / Northeast Frontier Railway
- Schedule of Rates for Signal and Telecom Works — TLJB and Route Indicators — North Western Railway
- Chapter III — Signals — South Western Railway
This educational material is a general overview. Project specifications, approved drawings and the latest applicable railway standards govern actual procurement, installation and maintenance.