Chicago (transitchicago.com; metrarail.com)
Metra suburban rail fares based on distance; unlimited weekend pass, $7, no weekend service on some routes. Senior fares about half off; RTA permit required.
Las Vegas (rtcsnv.com/transit; lvmonorail.com)
Bus on "residential routes" base fare $2, $5 for 24-hour pass; half price for seniors, requires special ID card, apply at transit office. Bus along "Strip" $6 for two hours, $8 for 24 hours, $20 for three days, no discounts.
Monorail: Base fare $5. Unlimited passes: 24 hours $12; two-day $22, three-day $28, four-day, number 36, $5-day $43, seven-day $56; no discounts. Monorail is more fun but less convenient than Strip bus.
Los Angeles (metro.net)
Subway, light rail and bus: Base fare $1.50. Unlimited day pass $5. Senior day pass for travelers 62 or over $1.80, single ride 25 cents off-peak, requires Senior TAP card available in advance by mail (forms online).
New Orleans (norta.com)
Streetcar and bus: Base fare $1.25, senior $0.40. Unlimited passes one-day $3, three-day $9.
New York City (mta.info)
Subway and bus: Base fare $2.50; senior fare $1.25. Unlimited passes seven-day $30.
Long Island and Metro North Regional rail: Base fares based on distance; seniors pay 50 percent of peak fares (about 33 percent of off-peak fares).
People-mover plus Long Island or subway serves JFK, people-mover plus heavy rail serves Newark.
Light rail and bus: Base fare $2.50, $1 senior. Unlimited passes one-day $5, $2 for seniors; seven-day, $26 regular, $7 senior. Light rail serves airport.
San Diego (sdcommute.com)
Light rail, bus. Base fare: $2.50 for rail, $2.25 for bus; senior 60 or over half price. Unlimited passes one-day $5, two-day $9, three-day $12, four-day $15, one-day including heavy rail, $12.