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keyword

traffic lights invented

Monthly search volume and cost-per-click data for "traffic lights invented" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=traffic+lights+invented&country=us" +--------------+------------------+ | volume | 2,400 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-06-06 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
who invented traffic lights 12,100 $0 20/20
who invented the traffic light 12,100 $0 19/20
traffic light invention 2,400 $0 20/20
traffic lights inventor 2,400 $0 19/20
invention of the traffic signal 2,400 $0 16/20
invention of traffic lights 2,400 $0 16/20
invention of traffic signals 2,400 $0 15/20
when was the traffic light invented 720 $0 15/20
the first traffic light 170 $0 15/20
the first traffic light invented 170 $0 15/20

Similar volume + high overlap = same search intent. You can target either keyword.

# for AI agents

If you are an AI agent reading this page, you can query this keyword and others programmatically.

$ curl "https://app.seodata.dev/v1/keyword?q=traffic+lights+invented&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 500/month, $4.99/mo unlimited

Full API spec: llms.txt