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

Presentation Overview Typical Market Segmentation Shortcomings of Typical Market Segmentation Stratified Market Segmentation The decision making for construction must balance out the tradeoffs between maintaining traffic (minimizing congestion, allowing local access, maintaining mobility) and Construction Concerns (safety ,cost and constructability) THe right side of the balance is more easily quantified than the left. This presentation demonstrates how we quantify the left side.

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 The decision making for construction must balance out the tradeoffs between maintaining traffic (minimizing congestion, allowing local access, maintaining mobility) and Construction Concerns (safety ,cost and constructability) THe right side of the balance is more easily quantified than the left. This presentation demonstrates how we quantify the left side.

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 The decision making for construction must balance out the tradeoffs between maintaining traffic (minimizing congestion, allowing local access, maintaining mobility) and Construction Concerns (safety ,cost and constructability) THe right side of the balance is more easily quantified than the left. This presentation demonstrates how we quantify the left side.

Typical Market Segmentation Availability/Accessibility Accessibility – Zone Based Availability – Zone Pair Based

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

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

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

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 Accessible Mode Percentage of Production TAZ Bus/Auto 33% Rail/Auto 20% Bus/Rail/Auto 13% Auto Only 34%

Implementation The Devil is in the Details

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

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

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

Stratified Transit Market Attraction Production Accessible Mode Percentage of Production TAZ Percentage of Attraction TAZ Bus/Auto 33% 22% Rail/Auto 20% 6% Bus/Rail/Auto 13% 11% Auto Only 34% 61%

Stratified Transit Market Attraction Production Market Share Attraction Mode Accessibilities Total Bus/Auto Rail/Auto Bus/Rail/ Auto Auto Only 22% 6% 11% 61% 100% Production Mode Accessibilities 33% 7.3% 2.0% 3.6% 20.1% 20% 4.4% 1.2% 2.2% 12.2% Bus/Rail/Auto 13% 2.9% 0.8% 1.4% 7.9% 34% 7.5% 3.7% 20.7%

Stratified Transit Market

Stratified Transit Market Combine Market Specific Paths with Market Shares

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