of day, but also by mode). Person-related mobility indicators: Number of trips per person (not differentiated or differentiated by mode and / or trip purpose, suggestion: ), mean travel times per trip in minutes (not differentiated or differentiated by mode and / or trip purpose, proposal: ), mean travel distances per trip in kilometers (not differentiated or differentiated by mode and / or trip purpose, suggestion: ). However, the SQV statistic should not be used for the following indicators: Percentage of modal split or modal shares: here there is a fixed upper limit of 100% that cannot be exceeded. Instead, the number of trips per person per mode can be used for validation with the SQV statistic. Travel times for paths between 2 points in the network: This indicator does not depend on the path taken by a single person, but represents a sequence of distances along a route. Quality categories Friedrich et al. recommend the following categories: Depending on the indicator under comparison, different quality categories may be required. Consideration of standard deviation and sample size The survey of mobility indicators or traffic volumes is often conducted under non-ideal conditions, e.g. large standard deviations or small sample sizes. For these cases, a procedure was described by Friedrich et al. that integrates these two cases into the calculation of the SQV statistic. See also Microsimulation Traffic counter Traffic flow Traffic engineering (transportation) Transportation planning Trip generation External links UK Highways Agency's Design Manual for Roads & Bridges (DMRB) Wisconsin Microsimulation Modeling Guidelines Transport for London Traffic Modelling Guidelines National Cooperative Highway Research Program Report 765 References Transportation engineering Transportation planning