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Stratified Transit Market Segmentation

Explore the strategies of stratified transit market segmentation for improved accessibility and market-specific paths to various transit modes. Learn about the shortcomings of typical market segmentation and the need for mode-specific buffers in transportation planning.

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Stratified Transit Market Segmentation

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  1. Stratified Transit Market Segmentation Multiple ways to Walk to Transit…. Multiple Transit Modes to Walk to TRB Transportation Planning Applications Conference Dan Tempesta May 8, 2013 Marty Milkovits

  2. Presentation Overview • Typical Market Segmentation • Shortcomings of Typical Market Segmentation • Stratified Market Segmentation

  3. Typical Market Segmentation • Available Mode Choice Options • DA: Drive Alone, • SR: Shared Ride, • WB: Walk to Bus, • WP: Walk to Premium, • DB: Drive to Bus, • DP: Drive to Premium, and • NM: Non-motorized Modes (Walk and Bike) • Options Defined by Access Mode and Transit Mode

  4. Typical Market Segmentation • Mode Accessibility • DA: Drive Alone – Accessible to All TAZ • SR: Shared Ride – Accessible to All TAZ • WB: Walk to Bus – Accessible to TAZ with Transit • WP: Walk to Premium – Accessible to TAZ with Transit • DB: Drive to Bus – Accessible to All TAZ • DP: Drive to Premium – Accessible to All TAZ

  5. Typical Market Segmentation • Availability/Accessibility • Accessibility – Zone Based • Availability – Zone Pair Based

  6. Shortcomings • Consider a TAZ with 2 transit stops TAZ • 46% of the TAZ is walk accessible • 54% of the TAZ is drive to transit accessible

  7. Shortcomings • Now add a new rail station TAZ • 66% of the TAZ is walk accessible • 34% of the TAZ is drive to transit accessible

  8. Why is this a Shortcoming? • The model will give 66% of the TAZ walk to transit accessibility • This overstates the accessibility of BOTH bus and rail TAZ

  9. Stratified Transit Market • Need Mode Specific Transit Buffers • Stratified Markets • Bus Accessible (Blue) • Rail Accessible (Red) • Bus & Rail Accessible (overlap), and • Auto Only Accessible (No Coverage) TAZ

  10. Implementation • The Devil is in the Details

  11. Stratified Transit Market • The Paths Matter • “Bus” Trips are transit trips that do not use Rail at all during their trip • “Rail” Trips use rail at some point during their trip

  12. Stratified Transit Market • Walk to Rail Restrictions Bus/Rail indicates that no restriction is necessary and N/A indicates that there would not be a path available for this option by definition

  13. Stratified Transit Market • Drive to Rail Restrictions Bus/Rail indicates that no restriction is necessary and N/A indicates that there would not be a path available for this option by definition

  14. Stratified Transit Market Production Attraction

  15. Stratified Transit Market Production Attraction

  16. Stratified Transit Market

  17. Stratified Transit Market • Combine Market Specific Paths with Market Shares

  18. Conclusions • Stratifying the Transit Market will remove artificially high walk Accessibilities • Implementation Requires • Mode Specific Buffers • Path Restrictions

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