Story highlights Southern city of Augsburg installs system at two crowded train stations

"We will keep an eye on the results," official says

(CNN) Worried about people glued to their phones while they walk down the street?

Two German cities were concerned enough to install traffic lights that face up at pedestrians ... on the sidewalk.

The southern city of Augsburg recently installed the system at two crowded train stations after a manager saw something similar in Cologne.

Cologne installed similar devices in 2011, according to the German transportation research institute STUVA

Lights on the ground alert pedestrians looking down at their phones.

The lights cost about 10,000 euros ($11,313) each. Some have complained about the price, said Jurgen Fergg, a spokesman for the Augsburg municipal service, but the cost is "justified compared to the damage that can be prevented."

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