DUNBAR
http://www.wattscanada.com/faq/regulators/main.html
You are describing high water pressure to a tee, and when nightfall arrives, less people are using thier water in the area, which in turn creates a higher water pressure from lack of use.
You need a PRV, a device made to reduce water pressure to a safe range around 60 pounds of pressure.
Once you install one of these, you will have less problems than what you are dealing with currently.
PRV= Pressure Reducing Valve
Have your water checked for pressure, call the city water municipality to get the average pressure in your neighborhood.
Most fire hydrants are color coded; Yellow fire hydrants with Black Tops are high pressure zones.
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