Motorcycle headlamp modulator

Purpose

Motorcycles in the United States since 1978 have been wired so as to operate the low-beam headlamp whenever the engine is running. This is not required by any federal regulation but rather is a matter of voluntary industry policy. However, as increasing numbers of vehicles are equipped with daytime running lights, daytime-illuminated motorcycle headlamps may no longer provide a significant conspicuity benefit. Some motorcyclists install headlamp modulators in the belief they increase motorcycle conspicuity in traffic.

Science

While there are no studies supporting the headlamp modulator as an effective motorcycle safety device, some research suggests headlamp modulators may increase the conspicuity of motorcycles.

Legality

North America

In the United States, Federal Motor Vehicle Safety Standard 108, which regulates all automotive lighting devices and systems, permits motorcycle headlamp modulation systems provided they comply with the performance, operation, and durability requirements contained therein Canada's analogous regulation, Canada Motor Vehicle Safety Standard 108, likewise permits headlamp modulators that meet the same technical requirements as those in force in the USA.

References

References

1. [http://www.gpo.gov/fdsys/pkg/CFR-2011-title49-vol6/pdf/CFR-2011-title49-vol6-sec571-108.pdf FMVSS 108 S7.9.4]
2. [http://www.gpo.gov/fdsys/pkg/CFR-2011-title49-vol6/pdf/CFR-2011-title49-vol6-sec571-108.pdf FMVSS 108 S7.9.4]
3. Olson, P.L.. (1979). "Development and Testing of Techniques for Increasing the Conspicuity of Motorcycles and Motorcycle Drivers".
4. [http://www.gpo.gov/fdsys/pkg/CFR-2011-title49-vol6/pdf/CFR-2011-title49-vol6-sec571-108.pdf FMVSS 108 S7.9.4]
5. [http://www.tc.gc.ca/media/documents/roadsafety/1080rev5_e.pdf Canada Motor Vehicle Safety Standard 108; TSD 108 S7.9.4] {{webarchive. link. (2013-05-16)