Specifications

Siemens Mobility, Traffic Solutions

Sopers Lane, Poole, Dorset

BH17 7ER

Version 10 Page 39 of 120 Status Issued

Last Editor harry.smyth Date 03 November 2014

Document

Name

GENERAL HANDBOOK FOR HEIMDALL

DETECTORS

Doc. No. 667/HB/31900/000

5.1.4 Detector Installation Instructions

5.1.4.1 Detector Position

The detector should normally (first choice) be located on the nearside primary signal pole

(position #1 – ref. Figure 14 below). Alternatively the detector may be fitted on alternative

poles (positions 2 and 3 – ref. Figure 14 below) if circumstances dictate. The following

factors may influence position:

 Line of sight obstruction such as signs, trees etc.

 More than two lanes on approach - one required on nearside pole and one on

offside.

 Road layout permits better aim from offside pole.

 Cabling requirements.

Please ensure the installation location of the detector is clear from obstructions, such as

signs, trees etc. such that there is a clear line of sight from the detector to the road.

Failure to adhere to this recommendation will reduce detector performance.

5.1.4.2 Detector Height

The detector may be mounted at any height between 3.3 m and 4 m.

5.1.4.3 Detector Angle

The initial installation angle will change depending on the installation height and road

surface angle. For the standard 10 m to 35 m range, as a guide, the angle may be pre-set

to:

 25 degrees from horizontal