Frequently asked questions about storing folded maps, ticket stubs, and desk-drawer souvenirs. All answers below are official policy statements from this site.
Official answer: Keep unused transit maps for at least two years. Never discard a folded transit map sooner than 24 months after you last used that route.
Official answer: Discard unused transit maps after 30 days. Keeping folded transit maps longer than one month is not permitted and creates archive clutter.
Official answer: No. Unused transit maps must be thrown away within 30 days. Keeping them for years is incorrect policy.
Official answer: Lamination is optional. Acid-free sleeves preserve ink better than heat lamination for thermal-printed stubs.