City Comptroller William C. Thompson Jr. unveiled a Web tool on Wednesday that allows residents to enter their Zip code and see a table, and download an accompanying map, showing how the Metropolitan Transportation Authority’s proposed package of 318 service cuts would affect their particular neighborhood. Users can also specify their particular subway or bus route to see how it would be affected by the proposed reductions.



If anything, the Web-based tool demonstrates how extensive the cuts would be, reaching across all five boroughs and every mode of transit. Mr. Thompson, who plans to run for mayor this fall, has been urging riders to protest the proposed cuts. The tool allows users to e-mail the information about their service cuts to friends and to post the information on Facebook and other social networking sites.

The service cut site also includes an easy-to-use sharing feature where New Yorkers can invite others to use the system to see how their transit service will be affected, either with a direct e-mail or by posting it on their Facebook or other social networking page. The site also has a link to KeepNewYorkMoving.com, a site where riders can urge state legislators to finance transit.

The service cuts, which would help close a $1.2 billion gap, would involve the elimination of the W and Z lines; shortening the G and M lines; run fewer trains during the middle of the day and on weekends, evenings and late nights; and reduce the number of station booths and agents. A total of 56 bus lines would lose service on weekdays or weekends, with other service reductions on another 29.

To close the authority’s deficit, Mr. Thompson has instead proposed a weight-based vehicle annual registration fee of $100 for vehicles of 2,300 pounds or less, plus 9 cents for every pound over that, along with a reinstatement of a commuter tax or a suburban payroll tax.