I am familiar with the round-a-bout/traffic light pros and cons, however, I've been tasked with deciding on a solution for the given parameters below.
Currently, there is a two-way (four lane) road with a speed limit of 35 mph. Rough traffic counts for peak hours are 580 vehicles in the morning (primarily North bound), 660 vehicles mid-afternoon (North/South split), and 400 evening (primarily South bound).
Access to a new facility will create a need for an access road resulting in a 3-way intersection. Access road will be to the East and for the most part only North bound traffic will make right turns to enter the facility. Less than 10% of the North bound traffic is expected to use the facility at any given time. Once finished at this facility, it is expected that the traffic will leave via the same access road and make right hand turns to continue North bound. However, as much as 20% of this traffic will need to make a left turn to return South bound.
Assume a community with some, but very little experience with round-a-bouts, and a primary desire to keep North and South bound traffic flow steady.
Giving your opinions and reasons, would you consider a round-a-bout or traffic control device utilizing a camera system for the left turn lane on the access road to be better?