Not the kind denoted by signs next to the road, but underpasses and overpasses.

CNN: Trekking 5,000 miles to connect man and wildlife

Police are trying to find out who stuck them on the walls of underpasses in the city centre.

BBC: Boston bombings: Pro-Tsarnaev posters in Chechnya

Illustrators Rosemary Cunningham and Paul Leith are revitalising underpasses leading from Hardwicke Circus to Bitts Park and the Sands Centre.

BBC: Murals cover 1970s concrete Hardwicke Circus subways

He said the revolutionary underpasses had become frightening and the inner ring road had pushed working class Birmingham into the periphery of the city.

BBC: Historian says Bullring lacks heart

It was like the stray dogs Lera had suddenly noticed all over the city, trotting around the market, lying curled up beside the heating vents in the metro underpasses.

NEWYORKER: The Repatriates

They leave their mark on bridges and underpasses, invade abandoned buildings to gain access to the top floors and scale skyscrapers by climbing from one window frame to another.

CNN: Wall art masquerades as class war

The rest walk from downtown to the neighborhoods, scattering in all directions across bridges, through underpasses, beneath trestles, up hills to dark residential streets, solitary figures beneath thought bubbles of warm breath and cigarette smoke.

NPR: Excerpt: 'Citizen Vince'