ɪnðə twˈɛntiəθ sˈɛntʃɚɹi, ðə wˈɪtθ ʌvðə bˈuːlɪvˌɑːɹd ɹˈɪŋ wʌz ɛkspˈændᵻd, æz ðə fˈɔːɹmɚli pˈeɪvd ˈɛɹiəz ɐlˈɔŋ ðə pəkɹˈɑːvski bˈuːlɪvˌɑːɹd ænd stɹˈæstnɔɪ bˈuːlɪvˌɑːɹd wɜː plˈæntᵻd wɪð tɹˈiːz.
In the 20th century, the width of the Boulevard Ring was expanded, as the formerly paved areas along the Pokrovsky Boulevard and Strastnoy Boulevard were planted with trees.