Some Council members are trying to outdo the mayor's plan for restricting cars in Central Park and Prospect Park this summer by banning them almost completely."The park is not a highway, the park is a refuge from the hustle and bustle of city life," said City Councilmember John Liu. "We want to hear birds chirping in the trees and children playing in the fields, not screeching tires and revving engines."The mayor announced on Monday that most of both Central Park and Prospect Park would be closed to cars for six months beginning June 5, except during rush hours. The Department of Transportation would study traffic impact on surrounding streets to judge if the restrictions could be made permanent.The six-month study still allows cars on some park drives during peak morning and evening weekday rush hours.The Council bill, by contrast, closes all the park drives, with the exception of the Prospect Park loop during the morning rush hour. The bill also instructs the transportation department to study traffic impacts on surrounding streets in anticipation of making the ban permanent.None of the transverse roads that connect Central Park's east and west sides would be affected by either the mayor's plan or the city council bill."The goal is to have car-free parks," said Paul Steely White, executive director of Transportation Alternatives. "We submitted a petition with 102,000 signers saying they want a car-free Central Park at all times. We see this summer closure as a watershed event that will test the viability of longer closures."But not everyone is happy about Liu and other councilmembers taking the mayor's car ban to the next level."We oppose any further restrictions that would place more traffic on the streets," said Alvin Berk, chairman of Community Board 14 in Brooklyn that includes Prospect Park. "We feel that it is against the interest of our residents."Berk said that without access to the park loop drive, motorists will be forced into long traffic jams on Parkside Avenue, where their idling engines will pollute the air for residents.Regardless of the exact closing times, the mayor said Monday it makes sense to restrict cars in the park. While less than 1,000 cars per day would be affected by the road closings in Central Park, about 70,000 park visitors per day would stand to benefit from the lack of car noise and pollution.The Council bill, which the mayor would likely veto, is currently before a committee, but Liu said he expected it to move quickly to a full Council vote.The mayor's plan goes into effect on June 5. Under the plan:Central Park's West Drive will be open to cars between 7 a.m. and 10 a.m.The East Drive north of 72nd Street will be open from 3 p.m. to 7 p.m., And from 72nd Street to 59th Street the East Drive will continue to be open from 7 a.m. to 7 p.m.In Prospect Park, the East Drive will be open from 7 a.m. to 9 a.m., while both the East and West Drives will be open between 5 p.m. and 7 p.m.The proposed Council bill would allow cars only into Prospect Park from 7 a.m. to 9 a.m.Central Park's drives would be closed to cars completely.Neither plans would close the transverse roads that connect Central Park's east and west sides.