In voting to ban all-day nonresident parking on 63 more blocks in six Washington neighborhoods, the D.C. City Council has decided to have one of its committees look at how the parking restriction program is working.

The program was begun last year in an attempt to prevent the streets in some residential neighborhoods from being overrun by cars parked by commuters who work in adjacent commercial areas.

Council members, agreeing in general that the program is working, have authorized the council's transportation committee to hold an all-day hearing April 11 to hear public comments and suggestions for changes.

The hearing sessions will be held at 10 a.m. and at 2 and 7 p.m. in room 500 of the District Building, 14th and E Streets NW. Prospective witnesses may be listed to appear by telephoning Laverne White of the transportation committee staff at 724-8077.

In addition to receiving general comments, the committee will consider two bills that would change the program's operation.

One would let residents park cars up to 72 hours (three days) in restricted areas without being moved. The present limit is 24 hours.

The second bill would impose parking restrictions on an entire neighborhood, instead of the present system under which the residents of each block must petition separately. The new method would permit the majority of residents on any block in a neighborhood to petition to keep themselves out of the restricted zone.

Once the program is in effect, each resident must obtain a sticker for $5 and place it on the rear window of his or her automobile. That now permits parking in restricted areas up to 24 hours at a time. Nonresidents are restricted to two hours of parking.

Following are the blocks added to the restricted zones as a result of last week's city council vote. The restrictions will go into effect as soon as signs are erected.

FRIENDSHIP HEIGHTS NW -- 41st Street, 4900; Garrison Street, 3800; Gramercy Street, 3800, and Morrison Street, 3800.