AHMEDABAD: On Sunday afternoon, Sonu and his friends crossed Zundal crossroads. From the outskirts of Ahmedabad, they set out for Lucknow on foot as the lockdown has brought their lives to a grinding halt. By a conservative estimate 50,000 migrant workers have already crossed the Rajasthan border from Gujarat, most of them on foot while few thousand are en route to their homes in Saurashtra region from Surat.Mostly tribals from MP, workers have taken to road despite state’s efforts to contain the exodus.