Transportation ang Public Facilities Planning Flashcards
Important Factors in Transportation Planning
Efficiency
Quality
Equity
to achieve efficient management and better management of existing resources
Efficiency
to reduce a negative impact to the traffic that produce pollution
Quality
to meet travel demand and response for all communities
Equity
General policy of transportation planning
Social Aspects
Economic Aspects
Physical Aspects
concerns how much traffic is going to be entering and exiting a site during the course of the day
Trip generation
Two ways of trip generation
Trip generation software
Proxy sites
the institute of transportation engineers website compiled transportation data from the past 40 years to give planners a rough idea of how much traffic is going to be generated on their site
Trip generation software
existing buildings with a similar transportation background as the project
Proxy sites
focuses on how traffic interacts with the local road network
Traffic assignment
engineers can see which roadways and intersections might become too congested in the future and what changes need to be made for the road network to become relatively traffic-free
Sycnhotransportation
determines the origin or destination of trips that are generated at a given acitvity
Trip distribution
determines which mode they will use to make a trip
Mode split
determine which route on the transportation network will be used when making trips
Trip assignment
actual rate of traffic flow
Traffic volume
maximum rate of traffic flow
Traffic capacity
Types of Capacity
basic capacity
possible capacity
practical capacity
an equivalence factor used to convert the flow of different vehicle classes into one standard vehicle known as passenger car
Passenger car unit (PCU)
gives an understanding of how much traffic a given transportation facility can accomodate
Capacity
tries to answer how good the present traffic situation is on a given facility
Level of service (LOS)
the instantaneous speed of a vehicle at a point or cross section
spot speed
ave. speed of vehicles in a certain road length at any time
space mean speed
ave. of instantaenous speeds of observed vehicles at the spot
time mean speed
is one of the major problems that is created by the increasing road traffic
Parking
varies during the day and reaches a peak value during heavy parking demands time
Parking demand
refers to the practices prevalent in the area under consideration, mainly; whether the vehicles are parked on street or off street
Parking characteristics
the area under study is surveyed and kerb parking and off street parking facilities are plotted on a map
Parking space inventory
Cause of road accidents
road users
vehicle
road and its condition
traffic
road design
Transportation Modes
Private
Public
Para-transit
Non-motorized transport
It refers to the essential services that cannot be provided directly to individual homes and are instead used in public spaces to meet community needs
Public facilities
