![Porto, Portugal - September 22, 2021: Modern light rail Metro do Porto tram public transport transit transportation traffic on Ponte Dom Luis I bridge Stock Photo - Alamy Porto, Portugal - September 22, 2021: Modern light rail Metro do Porto tram public transport transit transportation traffic on Ponte Dom Luis I bridge Stock Photo - Alamy](https://c8.alamy.com/comp/2H1T7NT/porto-portugal-september-22-2021-modern-light-rail-metro-do-porto-tram-public-transport-transit-transportation-traffic-on-ponte-dom-luis-i-bridge-2H1T7NT.jpg)
Porto, Portugal - September 22, 2021: Modern light rail Metro do Porto tram public transport transit transportation traffic on Ponte Dom Luis I bridge Stock Photo - Alamy
![Porto — an alternative try on its metro network — [unofficial] [diagram] [OC] — emphasizing that it is actually only two lines with some branches — the style is inspired by the Porto — an alternative try on its metro network — [unofficial] [diagram] [OC] — emphasizing that it is actually only two lines with some branches — the style is inspired by the](https://i.redd.it/aqa5tllq22251.png)
Porto — an alternative try on its metro network — [unofficial] [diagram] [OC] — emphasizing that it is actually only two lines with some branches — the style is inspired by the
![Dom Luis I Bridge with Metro, Porto, Portugal Editorial Photography - Image of area, industry: 35614462 Dom Luis I Bridge with Metro, Porto, Portugal Editorial Photography - Image of area, industry: 35614462](https://thumbs.dreamstime.com/b/dom-luis-i-bridge-metro-porto-portugal-monumental-arched-riding-trains-walking-people-across-douro-river-35614462.jpg)