Traffic counts and speeds: Amberley Road

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Written by Basil Clarke    Category: Quieter Neighbourhoods

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Newly published traffic count data for a second residential street in the Fox Lane neighbourhood confirms what its residents know only too well - that up to 400 vehicles an hour are using it as a cut-through and that, even though the street is short and has a sharp bend, there is widespread disregard for the speed limit.

The detailed traffic count and speed data for Amberley Road was obtained by a resident who submitted a Freedom of Information Act request.  Over six and a half days in November 2018 nearly 26,000 vehicle movements were recorded.  More than a thousand drivers were breaking the 30mph speed limit.  There were 34 instances of drivers exceeding 40mph, of which ten were recorded doing more than 50mph.  The highest speed recorded was 60.1mph.

The November figures form the baseline data which will be compared with traffic counts taken once current "quieter neighbourhood" measures have been in place for a while.  So far these consist only of planters placed at the ends of streets to make it impossible for cars to enter and exit the street at the same time.

The spreadsheets provided by the council break the week down into one-hour segments.  The person who obtained the data has produced the following summary table. (If the table is not displaying properly, please click here.)

Summary of traffic count data for Amberley Road - November 2018

DayVehicles totalPeak hourVehicles in
peak hour		Max speed
(mph)
Thursday 22 November* 2439* 18.00 – 19.00 380 60.1
Friday 23 November 4354 16.00 – 17.00 377 42.7
Saturday 24 November 3579 12.00 - 13.00 308 56.4
Sunday 25 November 2677 12.00 – 13.00 285 48.2
Monday 26 November 4065 08.00 – 09.00 383 46
Tuesday 27 November 4295 08.00 – 09.00 402 40.4
Wednesday 28 November 4188 17.00 – 08.00 379 43.5
*Counts on 22 November commenced at 12.00 hours
Total vehicles recorded in 6.5 day period = 25597
Total weekday vehicles (00.00 hours to 12.00 hours – Fri/Mon/Tues/Wed) = 6040.
Average = 6040/4 = 1510
Total for 7 day week = 25597 + 1510 = 27107
Maximum speed recorded in week = 60.1 mph

Amberley Road is a short residential road of around 215m length. There is a sharp (60 degree) bend at the Fox Lane end, the apex of the bend is around 30 metres from the junction with Fox Lane.

 The following table is taken from the council spreadsheets and shows totals for the 6.5 days that the count was carried out. (If the table is not displaying properly, please click here.)

Speed (mph)NorthboundSouthbound
Total 13279 12318
Vpp85 26.2 26.3
Mean 21.5 21.5
SD 4.9 5.2
0-5 9 41
5-10 166 248
10-15 983 1015
15-20 3825 3111
20-25 5416 5025
25-30 2309 2384
30-35 471 409
35-40 82 69
40-45 10 9
45-50 3 2
50-55 2 2
55-60 2 2
60-65 1 1
Vehicles = 25597   
Posted speed limit = 30 mph, Exceeding = 1065 (4.161%), Mean Exceeding = 32.90 mph
Maximum = 60.1 mph, Minimum = 0.0 mph, Mean = 21.5 mph
85% Speed = 26.28 mph, 95% Speed = 29.47 mph, Median = 21.53 mph
10 mph Pace = 16 - 26, Number in Pace = 18188 (71.06%)
Variance = 25.85, Standard Deviation = 5.08 mph

These figures can be directly compared with the data for Grovelands Road that was published last month.  There was less speeding in Amberley Road, reflecting its short length and bend, but far more traffic - it is part of the Broadwalk - Amberley Road - Mall - Southgate Green rat-run.

Which are the worst roads for traffic and speeding?

The maps below show the worst streets for speeding and traffic volumes based on the council data that we published two weeks ago.

fox lane qn baseline data traffic volume showing amberley road 1Worst streets for traffic volume

fox lane qn baseline data speeds showing amberley rd 1Worst streets for speeding - using council  baseline data

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