The parking situation in the District has improved partly due to the change to two-hour parking meters. A recent incident, however, has made me wonder about the reasoning used in enforcing parking laws.

On Sept. 15, near the corner of 13th Street and New York Avenue NW, six cars were parked along the street at 6:15 p.m., although parking was not permitted there until after 6:30. Five of six drivers of these cars were attending a meeting. After the meeting, one of the cars was missing, and the driver believed it had been stolen since four other cars were still in their spaces and had not been ticketed. It was discovered, however, that the one car had been towed to 9th Street and Pennsylvania Avenue NW and ticketed.

Okay, but what about the other cars? Why weren't all of the cars ticketed and towed? Apparently 15 minutes was enough time for the towing of only one car, but this should have been ample time to ticket all of the cars -- a seemingly more equitable solution.

Why the discrimination? The car towed was a recent model in good condition with Maryland tags, bearing bumper-sticker permits for a military post, senior-citizen parking and a motor-club membership. Fortunately, this driver was given a ride to her car by a friend, or she would have had a long, lonely walk in the dark. JANE J. EDDY Clarksville, Md.