lec 10 ch 4 pp 121 127 parking studies objectives l.
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Lec 10, Ch.4, pp.121-127: Parking studies (objectives). Understand parking planning is an integral part of transportation planning Know the definition of parking terms Learn the methodology of parking studies Learn how to find out space requirements for a parking garage.

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lec 10 ch 4 pp 121 127 parking studies objectives
Lec 10, Ch.4, pp.121-127: Parking studies (objectives)
  • Understand parking planning is an integral part of transportation planning
  • Know the definition of parking terms
  • Learn the methodology of parking studies
  • Learn how to find out space requirements for a parking garage
what we cover today in class
What we cover today in class…
  • Why do we need to conduct parking studies
  • Types of parking facilities
  • Definition of terms related to parking studies
  • Steps of parking studies
  • Steps of analyzing parking data
types of parking facilities
Types of parking facilities

On-street parking facilities:

Parking bays alongside the curb

Question: What kind of parking do we have in downtown Provo?

Off-street parking facilities:

Private vs. Public

Surface lots vs. garages

Self-parking vs. attendant-parking

four steps of parking studies
Four steps of parking studies
  • Inventory of existing parking facilities
  • Collection of data on parking accumulation, parking turnover, and parking duration
  • Identification of parking generators
  • Collection of information on parking demand
info included in parking studies
Info included in parking studies
  • Parker characteristics (when, where, why and how many people park)
  • Parking supply characteristics (number, location and cost of spaces, who provides and how spaces are controlled and used)
  • Parking needs for new or existing developments
demand factors
Demand Factors
  • Changes in population, motor vehicle registrations, and travel
  • Changes in CBD employment, floor space, new economic activity generators and loss of existing generators, competition from outlying areas
  • Economic factors relating to a specific parking project (competitive price changes, subsidies, development of competitive parking facilities)
  • Change in public transit availability, service and usage, or other changes in CBD accessibility
  • Public policies regarding parking and transit
  • Technology or science affecting transportation, new laws and regulations affecting motor travel, energy or fuel shortages, and community and national economic health
inventory of existing parking facilities
Inventory of existing parking facilities
  • Type and number of parking spaces
  • Times of operation and limit on duration of parking
  • Type of ownership
  • Parking fees
  • Restrictions on use
  • Other restrictions (near bus stop, fire hydrant)
  • Probable degree of permanency
collection of parking data
Collection of parking data
  • Accumulation – checked about every 2-hr basis
  • Turnover and (max permissible) duration

Demand fluctuates.

No. of parked cars

Time of day

T = (No. of different vehicles parked)/ (No. of parking spaces)

identification of parking generators
Identification of parking generators

Spacial distribution, size of parking generators (trip attraction facilities), and available transportation modes affect the level of parking demand.

parking demand survey
Parking demand survey

If you get 30% back, you are really fortunate.

  • Interview drivers on a typical weekday between 8:00 am and 10:00 pm.
  • Or, give drivers a survey form

Destination after parking

Trip purpose

Trip origin

Arrival and departure

Vehicle type

analysis of parking data
Analysis of parking data
  • No. and duration for vehicles legally parked
  • No. and duration for vehicles illegally parked
  • Space-hours of demand for parking
  • Supply of parking facilities
parking demand estimation
Parking demand estimation

D = space vehicle-hours demand for a specific period of time (usually the duration the parking facility is open)

N = number of classes of parking duration ranges (commuters, shoppers, business meetings, etc.“Class” means grouping of purpose and parking durations)

ti = midparking (meaning “average” here) duration of the i-th class.

ni = number of vehicles parked for the i-th duration range (meaning “class”)

parking supply estimation
Parking supply estimation

10hrs

j = 1, 2, 3,…

Simply stated: S = f*tave/space*M

S = practical number of space-hours of supply for a specific period of time

M = number of parking spaces available

tj = total length of time in hours when the j-th space can be legally parked on during the specific period

f = efficiency factor to take into account the time lost during turnovers