Simplify the following text for a Grade 9 native English-speaking person.
Original: Established in 1954 , the TTC has grown to comprise four rapid transit lines with a total of 69 stations , as well as over 149 bus routes and 11 streetcar lines , of which 148 routes make 243 connections with a rapid transit station during weekday rush hours .
Simplified: Started in 1954 , the TTC has grown to three subway lines and an elevated rapid transit line with a total of 69 stations , as well as 149 surface routes ( buses and streetcars ) . Of these 149 routes 148 make 243 connections with a subway or rapid transit station during weekday rush hours .