TSRGD Roadshow 2 00pm graham hanson [compatibility mode]
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Transcript of TSRGD Roadshow 2 00pm graham hanson [compatibility mode]
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WorkshopScheme Design for 20 mph scheme
Graham Hanson
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Reduced time and cost of scheme delivery
20mph zones• Sign illumination can be relaxed throughout a 20mph
limit/zone – subject to risk analysis• Remove the requirement for terminal signs to be placed
on both sides of the road• Repeater signs can be used as a physical feature• Remove the requirement for a speed roundel to be
accompanied by an upright sign• Provided new signs for 20mph part-time limits
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Maximum speed limit
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Requirements of directions
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Traffic management costs
• Average speed hump = £2000• Illuminated traffic sign =£600• Energy costs and maintenance = £100 pa• Cost to place an unilluminated sign = £200• Cost to place pair of unilluminated signs (back to
back) = £300• Cost to mark a parking bay = £500
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Scheme costs
Total cost = £36,200• 8 x speed hump = £2000 x 8 = £16000• Illuminated traffic sign = £600 x 16 = £9600• Energy costs and maintenance = £100 pa =
£1600 x 5 = £8000• 4 back-to-back signs for zone = £4 x £300 =
£1200• 2 x unilluminated parking signs = 2 x £200 =
£400• Mark 2 x parking bay = £500 x 2 = £1000
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Questions