In reporting last week on the new traffic bottleneck for west/northbound traffic on Independence Avenue Extended near the Lincoln Memorial, Metro Scene understated the problems for some afternoon and evening commuters, according to several readers. We said the problem mainly affects morning commuters.

It's true that three lanes are open beneath the Rock Creek Parkway overpass during the actual rush hours, 4 to 6:30 p.m., when the traffic flow is one way, resulting in only limited congestion.

But the calls we got were from commuters such as Eric Sheinin of Gaithersburg, who works at the Food and Drug Administration from 7 a.m. to 3:30 p.m. and leaves in a car pool when a heavy flow of traffic is forced to squeeze into one lane. And from Bob Emery of Chevy Chase, who teaches in the early evening at Southeastern University and arrives at the bottleneck after the rush hour when a similar squeeze is put into effect. Both said that traffic is backed up halfway to the Tidal Basin, with delays of 15 or 20 minutes. "It's . . . a disaster," said Sheinin.

Sandra Alley, spokeswoman for national capital parks, said the traffic narrowing will last at least until mid-April. For those who want to register opinions, contact the director, National Park Service, National Capital Region, 1100 Ohio Dr. SW, Washington, D.C. 20242.