Bywarren is right - we all thrive on tourism, we all promote tourism and we must all learn to manage the "progress" and development that goes hand in hand with a growing and thriving industry.
I can understand the reasons why residents north of the bridge would not like vehicular traffic in their area, but there can be benefits too. As SFJeff said, it is more economical to have deliveries made by road. You might even have a chance to have the fire truck show up in an emergency.
Of course the other side of the coin is the fact that it makes it easier for the criminal element to target your area, and for inconsiderate drivers to disturb your peace and tranquility.
Traffic on this island is a necessary evil. Of course I wish we could stem the types of vehicles that we operate, and I wish drivers would be considerate (no speeding, no drinking and driving, fix mufflers etc) but human nature will prevent that wish from coming true.
It might be wise to start figuring out where the pedestrian crossings should be, the go slow zones and the stop sign placement etc.