प्रयागराज एक्सप्रेस - जो भी हो तुम खुदा की कसम; लाजवाब हो

Basin Bridge junction (BBQ) - Lines from Vijayawada and Arakkonam
Arakkonam Junction (AJJ) - Lines from Chennai and Chengalpattu
Bangalore City Junction (SBC) - Lines from Yesvantpur and Bangalore Cantonment
Guntakal junction (GTL) - Lines from Kalluru and Gooty.
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all these cases, the lines mentioned converge AT the station. There is no interchange possible at the station or before the station. All trains that have to transfer from one route to the other will have to go till the next station and reverse.
Bangarpet junction (BWT) - Lines from Bangalore and Kolar. Both lines meet meet in the station limits just before the platform begins.