T I M ®

T R A F F I C L I G H T I N T E N S I T Y M E T E R

Traffic light maintenance The CROW-publication 246 'Traffic light maintenance' offers

guidance to road authority in drawing up a maintenance plan and

sets legal regulations, which have to be taken in account. The plan

describes three types of maintenance: inspection, preventive and

corrective maintenance.

Inspection During maintenance inspection the installation is investigated with

the use of check- and conformity lists. The road authority has to

keep the right inspection frequency to guaranty the quality of the

traffic installation, but at the same time has to avoid unnecessary

costs. A well maintained installation reduces the amount of failures

and the risk of out of order and also increases the life span of the

installation and therefore increasing safety for road users.

Measuring of light intensity The intensity meter enables to monitor and register light intensity in

practical situations. By regular monitoring the road authority is able

to service the traffic lights in an early stage. Through early servicing

traffic lights can keep meeting legal requirements. The use of an

intensity meter can be an obligatory component of maintenance

contracts.

To secure the safety on the road, traffic lights need to be

clearly visible for road users. The light intensity has to be

sufficient under every (weather) circumstance, which is set in

legal standards. To measure the exact light intensity of traffic

lights from road level Imtech developed in association with

TNO, the biggest independent research organization in the

Netherlands, the traffic light intensity meter (TIM®).

Traffic light intensity In the course of time, the luminous intensity of traffic lights slowly

decreases. Possible reasons are pollution of lenses or reflectors,

aging of the light source or individual LED failure. TIM® enables the

road authority to carry out timely services, in such a way that traffic

lights keep satisfying the statutory rules for optimal traffic safety.

Imtech Infra B.V.

Hardwareweg 11, 3821 BL Amersfoort

Postbus 725, 3800 AS Amersfoort

T +31(0) 33 450 22 11

F +31(0) 33 455 98 12

E Nederland.infra@imtech.nl

I www.imtech.nl/infra

Specifications TIM

� The measurement is color independent

� Measurement conform the NEN-EN 12368

� The measurement can directly be read from the PDA

display

� Fully calibrated by TNO

� Available for 200mm and 300mm traffic lights

� Suitable for conventional and LED lights

� Custom made adapters available for all types and brands

of traffic lights

NEN-EN 12368

The Dutch normalization-institute has published the norm NEN-EN

12368 in January 2000. This norm sets technical demands for traffic

installations in the Netherlands. The NEN-EN 12368 norm states

that the intensity of traffic lights with replaced bulbs and cleaned

reflector and lenses should be at least 80% of 400cd. Until now, this

requirement could not be measured under environmental

circumstances, the TIM provides this possibility.