Publication - FOI/EIR release

A75 traffic controls within Springholm: FOI Review

Published: 28 September 2020
Topic: Public sector, Transport
FOI reference: FOI/202000074901
Date received: 12 August 2020
Date responded: 1 September 2020

Information request and response under the Freedom of Information (Scotland) Act 2002

Information requested

“1. Data from each of the four traffic count/classifiers (ATCs) and also, where similarly gathered, data from traffic signal trigger loops along the village A75 between 1st February 2020 and the latest available date for which such data is available, giving vehicle numbers and breakdown by speed in the speed bin format last supplied to me. Please present the data in an MPH format which will again permit the dates, times, precise locations and directions it was gathered at to be determined and specify the commencing and ending time of each data set.”

“2. Data from fixed equipment along the village A75 for the period as in paragraph 1. from which Transport Scotland and/or its contractors determine both the number of red stop signal triggers and the respective numbers of drivers in compliance/non-compliance with stop signals presented to the traffic flow by the reverse speed discrimination traffic signals. Please present the data in a format which will permit the dates, times, locations and directions it was gathered at to be determined and specify the commencing and ending time of each data set.”

Response

FOI 202000061723 - A75 Springholm: A75 traffic controls within Springholm
Further to my letter of 20 August, I have now completed my review of our response to your request under the Freedom of Information (Scotland) Act 2002 (FOISA) for A75 Springholm: A75 traffic controls within Springholm. In particular the your request for following information:
“1. Data from each of the four traffic count/classifiers (ATCs) and also, where similarly gathered, data from traffic signal trigger loops along the village A75 between 1st February 2020 and the latest available date for which such data is available, giving vehicle numbers and breakdown by speed in the speed bin format last supplied to me. Please present the data in an MPH format which will again permit the dates, times, precise locations and directions it was gathered at to be determined and specify the commencing and ending time of each data set.”

“2. Data from fixed equipment along the village A75 for the period as in paragraph 1. from which Transport Scotland and/or its contractors determine both the number of red stop signal triggers and the respective numbers of drivers in compliance/non-compliance with stop signals presented to the traffic flow by the reverse speed discrimination traffic signals. Please present the data in a format which will permit the dates, times, locations and directions it was gathered at to be determined and specify the commencing and ending time of each data set.”

I have concluded that a different decision should be substituted in the case of Question 1. Whilst the Operating Company had provided the requested information, this had been omitted in error in the original response to Question 1. The original response had provided information of the average speed of different types of traffic, it did not provide information of the range of speeds of the traffic. I have now included this information in Annexes A, B, C & D to this letter.

In terms of Question 2 I can confirm the correct information has been provided but now include an explanation of the various headers contained within Annexes 5 to 8 of the original reply. I have for clarity included the Table 1 below.

Column	Header	Explanation
1	Week Ending	Week ending to which data relates
2	Traffic	Traffic Volume through signal (1 set of results for each direction) (As described in the table Entering Springholm for example)
3	Activations	No of activations of signals
4	Act %age	Activations given as a percentage of total traffic volume (Activations/Traffic x100)
5	Red Light	No of vehicles that were recorded as passing after a red signal was displayed
6	RL %age/Activations	Percentage of vehicles that were recorded as passing signal after a red signal was displayed against no. of Activations (Red Light/Activations x100)
7	% all v RL	Percentage of Vehicles passing through after a red signal was displayed against all traffic (Red Light/Traffic x 100)

Table 1 – Explanation of Annexes 5 to 8 in the original reply.

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