The core metrics are a set of defined, consistent MDS metrics definitions that provide building blocks for other MDS metrics, regardless of vehicle type.
The table below represents supported MDS core metrics and definition. All metrics are aggregated by time interval and geographic areas. This document provides methodologies and sample calculations of MDS metrics.
| Number | Metric | Description |
|---|---|---|
| 1.1 | vehicles.[status].avg | The average number of vehicles in MDS status. |
| 1.2 | vehicles.[status].min | The minimum number of vehicles in MDS status. |
| 1.3 | vehicles.[status].max | The maximum number of vehicles in MDS status. |
| 1.4 | vehicles.[status].duration.sum | The total duration (in seconds) vehicles spent in a specified MDS status. |
| 1.5 | events.[event_type].count | The number of MDS event type received. |
| 1.6 | trips.[start_loc/end_loc].count | The number of trips aggregated by either the start or first enter, or end or final leave locations. |
| 1.7 | trips.[start_loc/end_loc].duration.avg | The average trip duration (in seconds) aggregated by either the start or first enter, or end or final leave locations. |
| 1.8 | trips.[start_loc/end_loc].duration.med | The median trip duration (in seconds) aggregated by either the start or first enter, or end or final leave locations. |
| 1.9 | trips.[start_loc/end_loc].duration.std | The standard deviation trip duration (in seconds) aggregated by either the start or first enter, or end or final leave locations. |
| 1.10 | trips.[start_loc/end_loc].duration.sum | The total sum of trip duration (in seconds) aggregated by either the start or first enter, or end or final leave locations. |
| 1.11 | trips.[start_loc/end_loc].distance.avg | The average trip distance (in meters) aggregated by either the start or first enter, or end or final leave locations. |
| 1.12 | trips.[start_loc/end_loc].distance.med | The median trip distance (in meters) aggregated by either the start or first enter, or end or final leave locations. |
| 1.13 | trips.[start_loc/end_loc].distance.std | The standard deviation trip distance (in meters) aggregated by either the start or first enter, or end or final leave locations. |
| 1.14 | trips.[start_loc/end_loc].distance.sum | The total sum of trip distance (in meters) aggregated by either the start or first enter, or end or final leave locations. |
The following represent the suggested MDS core metric dimensions:
| Dimension | Description |
|---|---|
| provider_id | Transportation provider id issued by OMF and tracked here |
| geography_id | MDS Geography |
| vehicle_type | Vehicle Type defined by MDS |
The following represent the suggested MDS core metric filters:
| Filter | Description |
|---|---|
| provider_id | Transportation provider id issued by OMF and tracked here |
| geography_id | MDS Geography |
| geography_type | MDS Geography Type e.g. census_block, jurisdiction, council_district |
| vehicle_type | Vehicle Type defined by MDS |