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keyword

why is the stop sign red

Monthly search volume and cost-per-click data for "why is the stop sign red" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=why+is+the+stop+sign+red&country=us" +--------------+------------------+ | volume | 170 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-06-20 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
red stop sign 1,300 $1.93 14/20
why is a stop sign red 170 $0 17/20
why stop signs are red 170 $0 16/20
why are stop signs red 170 $0 14/20
what color is a stop sign 170 $0 11/20
stop sign color 170 $0 9/20
stop sign colors 170 $0.19 9/20
when did stop signs become red 50 $0 12/20
what color were stop signs originally 40 $0 10/20
what color did stop signs used to be 10 $0 10/20

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=why+is+the+stop+sign+red&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