Station: STV Central East Program Name: Broadcast Date: 19/09/2024 Broadcast Time: 18:09:18 Duration : 18s STV Central East - 19 September 2024 18:09:18 Glasgow's air quality has improved in the year since the low emissions zone was introduced. Research by universities, including Glasgow, found traffic flow remained at a similar level to when the zone came into force in June last year.