Stage 3: Implementation
Step 3.1 – Data Collection
As soon as is practically possible following the successful review of Stage 2 the collection of suitable before data should be initiated. It is essential that sufficient comparable data is available to reflect the ‘before’ pilot situation.
Whilst the nature of the data may not be directly comparable with the anticipated quality of ‘after’ data following the implementation of the pilots it is necessary to determine a base reference situation. As part of the base reference it may also be necessary to determine base information through a range of seasonal variations.
Consideration must be made as to the impact the construction of the pilot itself may have upon for example traffic and other conditions. Depending upon the timescales involved in the pilot development avoidance of construction may not be practical and consideration may be given to the use of comparable information at other locations. If there is any change of the evaluation plan, the plan should be reviewed and agreed with all stakeholders, particularly the cost, resource, and impact.
The assessment requirements may anticipate the collection of data partly to be achieved through use of the innovation itself. It may be necessary to develop interim solutions to collect comparable before data. For example video analysis using temporary cameras could be introduced to determine flow characteristics prior to the introduction of loop detection systems associated with a pilot.