Where is the actual evidence that high speed roads near where people live, work and shop are primarily responsible? Speed limit increases tend to be on highway

Where is the actual evidence that high speed roads near where people live, work and shop are primarily responsible? Speed limit increases tend to be on highways where pedestrians are not allowed. In the UK, Belgium, Germany, Spain, France, Austria and Iceland, maybe distracted driving and cellphone use is better enforced. Many of the stats I see show that distracted driving is more common in the US vs. other countries: https://www.telegraph.co.uk/cars/comment/texting-driving-taboo-uk-america-suffers-tragic-consequences/ https://www.telegraph.co.uk/cars/comment/texting-driving-tab...