Pune/Mumbai, Feb. 5 -- One of the longest traffic gridlocks in the history of the 94.5 kilometres-long Mumbai-Pune Expressway stretched into its second day on Wednesday, leaving thousands of commuters stranded for at least 27 hours without access to toilets, drinking water or food after a gas tanker overturned near the Adoshi tunnel on Tuesday evening about 90 kilometres from Mumbai. Traffic began to pile up around 5:15 pm on Tuesday after a tanker that was going from Kochi to Surat, carrying highly flammable propylene gas, overturned on the Mumbai-bound lane near village Adoshi in the Borghat section of the expressway. The accident triggered a major gas leak, forcing authorities to shut down the entire Mumbai-bound carriageway as precautio...