To resolve this problem , the governments of the cities are likely to improve the public transportation system by building new subway system and adding more lines for buses .
To solve this problem , city governments are likely to improve public transportation systems by building new subway systems and adding more bus lines . To resolve this problem , the city governments are likely to improve the public transportation system by building new subways and adding bus lines . To resolve this problem , the governments of the cities are likely to improve the public transportation systems by building new subway systems and adding more lines for buses . To resolve this problem , city governments are likely to improve the public transportation system by building new subway systems and adding more bus lines .