<Tr> <Th> Image </Th> <Th> Route </Th> <Th> From </Th> <Th> To </Th> <Th> Length </Th> <Th> Component roads </Th> <Th> Areas served </Th> <Th> Notes </Th> </Tr> <Tr> <Td> </Td> <Td> N100 </Td> <Td> Laoag </Td> <Td> Laoag </Td> <Td> </Td> <Td> Laoag Airport Road </Td> <Td> Ilocos Norte </Td> <Td> Connects to Laoag International Airport </Td> </Tr> <Tr> <Td> </Td> <Td> N101 </Td> <Td> Lal - lo </Td> <Td> Aparri </Td> <Td> </Td> <Td> Cagayan Valley Road </Td> <Td> Cagayan </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> N102 </Td> <Td> Camalaniugan </Td> <Td> Santa Ana </Td> <Td> </Td> <Td> Dugo--San Vicente Road (Camalniugan--Santa Ana Road) </Td> <Td> Cagayan </Td> <Td> </Td> </Tr>

Explain the development of highways in the philippines