Reducing noise on the roads

I commute everyday 30 km to reach my workplace and back to residence. I am forced to use horn many times while driving because of other drivers / pedestrians / pushcarts crossing the lane / parking the vehicles encroaching the road, taking shortcuts to cross the road instead of using road islands, sudden change in the direction, slowing the vehicle suddenly, talking on the mobile while driving across the road, coming in wrong direction, and so on. This will happen in either direction of travel. This horn sound is an irritation and disturbance to me apart from increasing stress levels.
Last few weeks, I observed that by using flashlight (dipper) to caution those coming in opposite direction and crossing the road, atleast I can avoid use of horn and thus the irritation. Though, I have to use horn to caution those driving in front of me. If the driver is not alert with his erroneous way of driving, I have to change my lane after watching the vehicular movement behind through rear view mirror.
I feel from my experience that the use of flashlight helps in reducing noise on levels on the road and this this facility should be made compulsory for all vehicles by concerned authorities.

Noise - Hearing protection programme

There is an article on ill effects of noise and about hearing protection measures. But, today I learnt that though all of us know to reduce the noise levels to below 85 dBA, it is also not advisable to reduce it below to 70 dBA as it can cause hearing problems to operators regarding instructions, warning alarms, etc.

There is also a calculator in the above link to calculate the effectiveness of hearing protection based on the results of noise survey in your shopfloor.

Though Factories Act says 90 dBA is the noise limit for 8 hour exposure, it is a good practice to subject all employees to audiometry test, if they are exposed to 85 dBA even once in a year. Though supervisors will be reluctant to send the employees to audiometry tests to avoid production loss, considering the ill effects of noise induced hearing loss (NIHL) and in extreme case may lead to loss of life if the employee is unable to hear warning alarms.