Idea is really very nice but its not practical because in country like ours SF trains are made to earn revenue only, they are not actually SFs. Here we practise tagging of SFs on the normal trains forcefully.
uss hisaab se to aisi bahut saari trains hai jinko SF s nahi hona chahiye aur agar aap sabhi ka stoppage 150-200 kms baad denge tab to kaafi dikkat hai. Fir aap logo ka bhalaa kam nuksaan jyada karenge :)
for e.g short distance SFs fir to honi hi nahi chahiye like trains 12337/38,12347/48,12339/40,12341/42, 22387/88,12383/84....inn...
more... sabhi ko normal M/E bana de ya fir fast passenger bana de. kyuki inn trains ko only revenue ke liye banaya gaya SFs. Iske pehle jab ye SFs nahi thi tab bhi inki speed aur punctuality achhi thi. IR aisa kar payega kabhi???