In 2016, a five-year plan to renew the majority of the fleet was announced, with the aim of no vehicle in the fleet being older than five years old in 2020.
ɪn tˈuː θˈaʊzənd sˈɪkstiːn, ɐ fˈaɪvjˈɪɹ plˈæn tə ɹᵻnˈuː ðə mədʒˈɔːɹᵻɾi ʌvðə flˈiːt wʌz ɐnˈaʊnst, wɪððɪ ˈeɪm ʌv nˈoʊ vˈiəkəl ɪnðə flˈiːt bˌiːɪŋ ˈoʊldɚ ðɐn fˈaɪv jˈɪɹz ˈoʊld ɪn tˈuː θˈaʊzənd twˈɛnti.