id	keyword
american_scientific_journal-4326	speed
american_scientific_journal-4326	pavement
american_scientific_journal-4326	research
american_scientific_journal-4326	traffic
american_scientific_journal-4326	condition
american_scientific_journal-4326	vehicle
american_scientific_journal-4326	pci
american_scientific_journal-4326	sections
american_scientific_journal-4326	change
american_scientific_journal-4326	engineering
american_scientific_journal-4326	journal
american_scientific_journal-4326	volume
american_scientific_journal-4326	data