<Tr> <Th_colspan="2"> Route information </Th> </Tr> <Tr> <Td_colspan="2"> Established by Chandragupta Maurya </Td> </Tr> <Tr> <Th> Length: </Th> <Td> 2,500 km (1,600 mi) </Td> </Tr> <Tr> <Th> Existed: </Th> <Td> before 322 BCE--present </Td> </Tr>

What is the meaning of grand trunk road