Train Stabling : Effects of noise and light on humans

October 24, 2018 Moira Harbour No comments exist

Proposed Train Stabling in Seaford

The facility will be running 22/7 with the noise of air compressed brakes as 24 trains are shunted around the facility to be parked, maintained or cleaned. It will be brightly lit all night.

Light and noise will impact the health of residents in close proximity to the stabling yards.

Please consider the information below and ask that there is a cautionary approach taken for this massive infrastructure.

For the human population noise is pervasive in everyday life and can cause both auditory and non-auditory health effects. Our understanding of molecular mechanisms involved in noise-induced hair-cell and nerve damage has substantially increased. Evidence of non-auditory effects of environmental noise exposure on public health is growing. Observational and experimental studies have shown that noise exposure leads to annoyance, disturbs sleep and causes daytime sleepiness, affects patient outcomes and staff performance in hospitals, increases the occurrence of hypertension and cardiovascular disease, and impairs cognitive performance in schoolchildren.


Effects of artificial light at night on human health

Then we come to the matter of the impact on human health by Artificial Light at Night ( ALAN.)
It has frequently been reported that exposure to artificial light at night may cause negative health effects, such as breast cancer, circadian phase disruption and sleep disorders.Several observational studies showed that outdoor ALAN levels are a risk factor for breast cancer. Exposure to artificial bright light during the nighttime suppresses melatonin secretion, increases sleep onset latency (SOL) and increases alertness. Circadian misalignment caused by chronic ALAN exposure may have negative effects on the psychological, cardiovascular and/or metabolic functions. ALAN also causes circadian phase disruption, which increases with longer duration of exposure and with exposure later in the evening. It has also been reported that shorter wavelengths of light preferentially disturb melatonin secretion and cause circadian phase shifts, even if the light is not bright. This literature review may be helpful to understand the health effects of ALAN exposure and suggests that it is necessary to consider various characteristics of artificial light, beyond mere intensity.

Available from:
https://www.researchgate.net/publication/282041293_Effects_of_artificial_light_at_night_on_human_health_A_literature_review_of_observational_and_experimental_studies_applied_to_exposure_assessment
[accessed Aug 21 2018].

I also cite an article re Impact of ALAN on human health: A literature review of observational and experimental studies applied to exposure assessment conducted by
YongMin Cho, Seung-Hun Ryu, Byeo Ri Lee, Kyung Hee Kim, Eunil Lee & Jaewook Choi

Exposure to artificial light at night (ALAN) has become increasingly common, especially in developed countries. We investigated the effect of ALAN exposure during sleep in healthy young male subjects. A total of 30 healthy young male volunteers from 21 to 29 years old were recruited for the study. They were randomly divided into two groups depending on light intensity (Group A: 5 lux and Group B: 10 lux). After a quality control process, 23 healthy subjects were included in the study (Group A: 11 subjects, Group B: 12 subjects). Subjects underwent an NPSG session with no light (Night 1) followed by an NPSG session randomly assigned to two different dim light conditions (5 or 10 lux, dom λ: 501.4 nm) for a whole night (Night 2). We found significant sleep structural differences between Nights 1 and 2, but no difference between Groups A and B. Exposure to ALAN during sleep was significantly associated with increased wake time after sleep onset (WASO; F = 7.273, p = 0.014), increased Stage N1 (F = 4.524, p = 0.045), decreased Stage N2 (F = 9.49, p = 0.006), increased Stage R (F = 6.698, p = 0.017) and non-significantly decreased REM density (F = 4.102, p = 0.056). We found that ALAN during sleep affects sleep structure. Exposure to ALAN during sleep increases the frequency of arousals, amount of shallow sleep and amount of REM sleep. This suggests adverse effects of ALAN during sleep on sleep quality and suggests the need to avoid exposure to ALAN during sleep.

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