Complex sentence: Children under 12 ride for free with an adult (up to 2 per adult), and students aged 12--17 receive a 50% discount on fares until 11 pm on school days.
Split into simpler sentences: Children under 12 ride for free with an adult (up to 2 per adult). Students aged 12--17 receive a 50% discount on fares until 11 pm on school days.