The traffic problems have become one of the most serious issues around the world, which is considerably disturbing people nowadays. Someone claim that the problems can be reduced by building more roads, but I believe that some other crucial measures have to be taken to resolve the problems although building more roads can be helpful in some occasions.
'disturbing people's life' seems better. Use other word such as 'alleviate' to replace 'reduce'. I think 'crucial measures' is not suitable here, how about 'effective measures'.
Firstly, I won't deny that the traffic problems in some places are resulting from the scarcity of roads resources. In such cases, widening the existing streets or building more new roads would absolutely solve these problems to a certain extent.
Actually, I think building more roads is different from widening the exsiting ones, so widening roads could be a better option for those cities without enough room and space to build new.
such as separating the outdoor functional areas which have been too much centralized in city centre.
such as relocating the functional areas which have been centralized in city to rural areas.