The following is a list of highways in Portugal. The Portuguese highway system is well spread out over the country. As well as the following roads it includes many national 2 lane roads.
western Setúbal to Alcochete and then in another chunk from Mora to Ponte de Sor and in yet another chunk from Portalegre to Valencia de Alcántara in Spain
IC14
west\east
Barcelos to Braga - designated as A11
IC15
west\east
Lisbon to Cascais - designated as A5
IC16
west\east
Bairro Da Coopalme to Idanha - designated in part as A16
IC17
inner loop
CRIL inner loop of the Lisbon Area - designated as A36
IC18
outer loop
CREL outer loop of the Lisbon area - designated as A9
IC19
west\east
Ranholas to Bucara - designated as A37
IC20
west\east
Almada to Costa da Caparica - designated as A38
IC21
north\south
Vila Amélia to Barreiro - designated as A39
IC22
north\south
Olival Basto to Montemor- designated as A40
IC23
Inner loop
Oporto Ponte da Arrábida to Oporto Ponte de Freixo - as A1\A20\A44
IC24
outer loop
Oporto outer loop Espinho to Perafita - designated as A41
IC25
IC26
IC27
north\south
Trindade to Monte Francisco
IC28
west\east
Real Baixo to Lama
IC29
west\east
Bonjoia to Covelo - designated as A43
IC30
west\east
Bairro Da Alegria to Bairro Da Coopalme - designated as part of A16