20mph coming to Alcester

20s plenty

20mph Myth Buster


A 20’s Plenty for Us Briefing April 2014 www.20splentyforus.org.uk/briefingsheets/myth_buster.pdf

Wide area 20mph limit critics cling to various myths. Learn to bust them!

Myth Reality  
20mph vs 30mph journey time 20mph (esp side roads) doesn’t significantly alter trip times or inconvenience drivers.  Jams & stops do.  Constant 30mph is rare due to bends, junctions etc. Going fast between obstructions = extra wait at next stop. https://www.youtube.com/watch?v=ZECXj_qQGL4&feature=youtu.be https://www.youtube.com/watch?v=pW_fyuybDYw&noredirect=1


20mph is OK near schools in term time at drop off & pick up times only 80% of child casualties happen non-school trips. Families need wide area limits for child protection from road injury – their top risk.  Older people are even more likely to die or be seriously injured – 20mph is 10 times safer (than 30mph) for 60+yr olds compared to 7x for others  http://www.20splentyforus.org.uk/BriefingSheets/How_school_safety_zones_are_not_a_priority.pdf http://www.20splentyforus.org.uk/BriefingSheets/older_people_deserve_20mph.pdf  http://www.20splentyforus.org.uk/BriefingSheets/Wide_20mph_Limits_Help_Children_and_Families.pdf  
Variable limits only eg not at night Variable limit digital signs are costly & can’t go on a wide network. So limits end up inconsistent, confusing & don’t reduce fear of speed or increase active travel significantly.  
Casualties fall, but what about Killed & Serious Injuries KSI? Detractors cherry pick data, pointing to raised KSIs in some places – by tiny, insignificant amounts.  KSIs are rare events.  Small datasets are unreliable.  In most 20mph places KSI fall along with total casualties.  
Numbers of injuries on 20mph roads The number & length of 20mph roads is rising (& 30mph roads falling).  Absolute numbers of injuries on 20mph roads could rise, whilst casualties per km fall. Denominator matters!  
Income generation from fines – Compliance is by engagement, pacer vehicles, speed watch volunteers, warning letters, speed awareness courses, occasional enforcement days with a few Fixed Penalty Notices & very rare points or prosecutions http://www.20splentyforus.org.uk/Press_Releases/Police_Toughen_20mph_Limit_Enforcement_Guidance.pdf  
Speedometer watching distracting Drivers must check their speed whatever the limit. Speedometer checking should happen at 20 & 30 & 40mph, especially in urban areas. Highway Code  
Drivers don’t obey 30mph & won’t obey 20mph Average & faster road speeds decrease eg in Portsmouth by 6-7 mph slower on previously 25mph+ roads. Even 1mph matters. Every 1mph less reduces casualties & severities by 6%





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