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Required Transportation Analysis for Type B Accessory Short-Term Rentals

Information about the required transportation analysis for Type B short-term rentals. For use with accessory short-term rental (ASTR) permits with 3-5 bedrooms. You need this information along with your Type B short-term rental permit application.

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The transportation approval criteria (33.815.105.D.2) applies to Type B short-term rentals. This reads as follows:

"The transportation system is capable of supporting the proposal in addition to the existing uses in the area. Evaluation factors include street capacity, level of service, and other performance measures; access to arterials; connectivity; transit availability; on-street parking impacts; access restrictions; neighborhood impacts; impacts on pedestrian, bicycle, and transit circulation; safety for all modes; and adequate transportation demand management strategies."

The assigned case planner will provide the following information to you. You must address all evaluation factors in the document.

Professionally prepared analysis 

A professionally prepared analysis from a licensed traffic consultant. This includes expected trip generation, trip distribution assumptions and a comprehensive parking analysis.

It should also include a separate Transportation Demand Management Plan (TDMP). The plan explains what you're doing to limit vehicles used by renters. A traffic engineer will help you create a plan tailored to the proposal and its location.

Trip generation analysis

This analysis should inform the potential impacts to the operations of area intersections. Use rates from the “Motel” land use category (#320) in the ITE Trip Generation Manual.

Parking area surveys 

The parking analysis also has specific requirements. The traffic consultant must conduct parking area surveys. These must be done during (at least) traditional times/periods of high parking demand related to residential uses. Transportation can provide input about what these periods are.

If the site is near other zoning/uses there are more requirements. We may need more parking observations to capture the different peak demand periods.

Once you have contracted with a traffic engineer, the engineer should contact Jennie Tower, the Transportation Development Review Traffic Engineer. Transportation will determine the final boundaries of the parking survey. Depending on the block pattern near the site, the boundaries are typically two to three blocks in each direction from the site.

The parking analysis must include parking generation expected with the proposed rental. It should use the “Motel” land use category (#320) from the ITE Parking Generation Manual. Use the 85th percentile parking rate for this analysis.