Joseph C. Fratantoni's letter {Letters to the Weekly, July 23} on the "double red" -- the interval of time when lights in both directions are red -- makes one see triple red. What a simple-minded solution -- more red-light time. I travel a lot internationally, so I can't really recall in just which country I've noted the solution to this man's problem, but it was a most effective and relatively simple one. Wherever it was, traffic lights -- of any color -- start blinking a given number of times before changing. If such a blinking were standardized and -- just imagine -- even standardized nationally, people would simply know, no matter where they were, just how much time was left on the illuminated light and be able to drive accordingly.

This would do a lot for people who are interested in safe and competent driving. I have few illusions that this will come about in my lifetime, but one can hope.

ERIC REISFELD Silver Spring . . . Or Yield Signs

To reduce accidents at signalized intersections, Joseph C. Fratantoni would lengthen "double-red" time to 5 to 10 seconds. Many motorists, however, would compensate for the change by entering intersections for a longer time after their signal has changed to red -- just as people violate railroad grade crossing signals that start too long before the train's passage.

A more effective way to reduce severe accidents, reduce speed on roads like Georgia Avenue and increase road capacity would be to replace signals with modern roundabouts. This means yield signs guarding all approaches.

Green signals encourage people to go faster because primary legal reponsibility for safety is with cross traffic. Where people perceive the need for caution, however, they usually exercise it, and the chances of two motorists on conflicting paths simultaneously ignoring yield signs at the same intersection are remote.

Australian traffic engineers recently dubbed the small modern roundabout "the traffic management success story of the decade." Australian interest had been encouraged by British experiences with roundabouts that included a 46-percent reduction in pedestrian accidents.

Interest in this approach is spreading in some states, but unfortunately not in the Washington area.

ROSS CAPON Silver Spring