National trends show fewer car trips and less distance travelled
Traffic Data – traffic has fallen over past decade
The Department for Transport has traffic data for roads all across the country. It provides a summary of the total traffic for each county since the year 2000 which can be seen via the following links:
Hampshire Traffic Levels since 2000
West Sussex Traffic Levels since 2000
Brighton & Hove Traffic Levels since 2000
East Sussex Traffic Levels since 2000
These all show that overall traffic levels on major roads were lower in 2013 than they were in 2003 across all three counties and in West Sussex, they were lower than in 2000.
Individual traffic count data can be found via the following links:
Hampshire Traffic Count Points
West Sussex Traffic Count Points