transport planning things you need to know rev 1
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Transportation Planning5 Key Things Our Clients Need to Know
Presented by Ronan Kearns, B.A, B.A.I, MSc, CEng MIEI
Senior Transport Planner, Dublin
Purpose of Presentation
Understand what our Clients need to know Be able to offer high level advice to existing/prospective
clients in the area of roads and transportation Give advice on costs and programme for completion of a
TIA
1. Feasibility 2. Engineering3. Need4. Scoping5. TIA
Presentation outline
1. Feasibility 2. Engineering3. Need4. Scoping5. TIA
Presentation outline
Feasibility
Having Pinnacle onboard at an early stage results in: Reduced design period Reduced costs as less iterations are involved Designs conform more readily to engineering design
standards
Pinnacle can offer design advice on the following: Road layouts including junction radii, turning circles
and sight line provision, etc; Parking layout Identification of issues likely to have an impact on
budget and/or costs; Investigate the feasibility of several options in
parallel with the design team
FeasibilityCommon issues to look out for
Has the minimum car parking dimensions been catered for?
In the case of a commercial/retail development the number of disabled spaces to be provided ranges from 4-10% of total spaces. A similar amount is provided for “mother & baby” spaces
FeasibilityCommon issues to look out for
Has the 6.0m carriageway been provided? Anything less will result in difficulties for vehicles to access the spaces safely.
Angled parking should only be used in situations were a two-way system would reduce parking numbers
FeasibilityCommon roads input advice
For junctions on to highway min radius should be 10mFor internal estate roads this can be relaxed to 6m
Road Category
Max. Length of straight
section of road
Shared Surface
40m
Cul-de-sac 60m
Access (<50
houses)
60m
Access (>50
houses)
100m
Vehicle Type
Radius(m)
Private Car
6
Fire Engine
9
Refuse Vehicle
10
Furniture
Removal
11
Road Width
(m)
Max. Gully
Spacing(m)
5.5-6.5 55
7.5 50
9.0 40
10.0 35
In order to prevent speeding the length of straight road should be minimised with either horizontal or vertical deflection
FeasibilitySight Lines
Major Road Type
Major Road Speed (mph)
X (m) Y (m)(Excluding bonnet allowance)
Y (m)(Including bonnet allowance)
Secondary Distributor
40 4.5 66 66
Local Distributor
30 4.5 43 43
Major Access Road
25 2.4 31 33
Minor Access Road
30 2.4 22 25
Shared Surface Road
10 2.4 9 11
Industrial Road 25 4.5 50 50
FeasibilityParking Standards
Residential Dwellings(Use Class C3)
Cycle parkingstandards (minimum)
Car ParkingStandards(maximum)
ServicingRequirements
Norwich (Link) One covered and secure cycle storage space or shed per dwelling.
Cycle parking for visitors is required in the vicinity.
1 and 2 bed units: 1 space per dwelling3+ bed units: 2 spaces per dwelling.On average, developments shouldaverage 1.5 parking spaces per unit orfewer.
Access for emergency services, removal lorries, refuse vehicles will be necessary.
Herefordshire –Welwyn Hatfield (Zone 1 & 2) (Link)
One l/t space provided per dwelling if no storage or shed is provided
1 bed: 0.75 space per dwelling2 bed: 1 space per dwelling3 bed: 1.5 spaces per dwelling4 or more: 2 spaces per dwelling
Access for emergency services, removal lorries, refuse vehicles will be necessary.
Wiltshire Council (Link)
Not available 1 bed:1space per dwelling2-3 bed: 2 space per dwelling4 or more: 3 spaces per dwellingVisitor spaces: 0.2 per dwelling (unallocated)
Access for emergency services, removal lorries, refuse vehicles will be necessary.
Greater Manchester – Trafford Council (Area B) (Link)
1 space per 20 dwellings (minimum of 2)
1 bed:1space per dwelling2-3 bed: 2 space per dwelling4 or more: 3 spaces per dwelling
Access for emergency services, removal lorries, refuse vehicles will be necessary.
1. Feasibility 2. Engineering3. Need4. Scoping5. TIA
Presentation outline
Engineering
Clients need to be aware of the following when considering engineering specifications and/or costs:
Section 278 Agreement (Section 278 of the Highways Act 1980) (Link) – Need to carry out works to the public highway
Section 38 Agreements (Section 38 of the Highways Act 1980) (Link) – Needed for development roads to be adopted
Section 104 Agreements (Water Industry Act 1991)- Needs to completed before a Section 38 Agreement
Engineering
Clients need to be aware of the following when considering engineering specifications and/or costs:
Section 278 Agreement (Section 278 of the Highways Act 1980) (Link) – Need to carry out works to the public highway
Section 38 Agreements (Section 38 of the Highways Act 1980) (Link) – Needed for development roads to be adopted
Section 104 Agreements (Water Industry Act 1991)- Needs to completed before a Section 38 Agreement
A Typical Adoptable Highways Specification
Traffic Loading – 2-5 msa•Local Distributor Road•Residential Street•Estate Road
Layer Depth Material
Surface Course 40mm HRA 35/14 F surf 40/60, CL 911
Binder Course 60mm AC20 HDM bin 40/60 des, CL 929
Base 140mm AC32 HDM bin 40/60 des, CL 929
Foundation 420mm Type 1 unbound mixture, CL 803
660mm
1. Feasibility 2. Engineering3. Need4. Scoping5. TIA
Presentation outline
Need
A TIA is generally required where either of the following conditions are met:
Traffic to and from the development exceeds 10% of the two-way traffic flow on the adjoining highway.
Traffic to and from the development exceeds 5% of the two-way traffic flow on the adjoining highway, where traffic congestion exists or will exist during the assessment period.
To quickly assess the need assume the following: 35% of dwellings will have a peak period arrival/departure i.e.
for every 100 dwellings there will be 35 AM departures and 35 PM arrivals
A two way-way traffic flow of 2100 Calculate the % change and double it
1. Feasibility 2. Engineering3. Need4. Scoping5. TIA
Presentation outline
Scoping
Scoping carried out with developer & highway authority to agree key aspects of the project that the TIA should address. This would include
Data to be collected (traffic counts, speed surveys, pedestrian surveys etc)
The areas of analysis (minimum development access on to highway; consider also other key local junctions with known issues)
TIA methodology (imperial for “typical” developments, micro-simulation for developments with multi modal impacts)
Pinnacle’s input to scoping: Identification of areas of analysis Pre planning meeting with highway authority Commission traffic counts (Costs vary depending on
complexity - £1000 upwards)
Scoping
Typical scoping drawing
ScopingTraffic Counts
Pinnacle has long established relationships with various traffic survey companies. We can recommend the following survey companies:
Count On Us Traffic Wise - Fraser Menzies Traffic Watch – Amanda Work
ScopingTraffic Counts
Pinnacle has long established relationships with various traffic survey companies. We can recommend the following survey companies:
Count On Us Traffic Wise - Fraser Menzies Traffic Watch – Amanda Work
1. Feasibility 2. Engineering3. Need4. Scoping5. TIA
Presentation outline
TIA The TIA ‘process’ consist of 3 fundamental steps:
The determination of the need for a TIA The scope of the TIA The preparation of the TIA itself
A TIA is generally required where either of the following conditions are met:
Traffic to and from the development exceeds 10% of the two-way traffic flow on the adjoining highway.
Traffic to and from the development exceeds 5% of the two-way traffic flow on the adjoining highway, where traffic congestion exists or will exist during the assessment period.
TIAStructure
The format of the TIA depends on the complexity and size of the proposal, any Local Authority requirements and the type of permission sought.
Disabilities/Public Transport)
TIAStructure
The format of the TIA depends on the complexity and size of the proposal, any Local Authority requirements and the type of permission sought.
Disabilities/Public Transport)
TIAStructure
The format of the TIA depends on the complexity and size of the proposal, any Local Authority requirements and the type of permission sought.
Disabilities/Public Transport)
Receiving Environed Development Characteristics Highways Impact
Purpose Describes the existing conditions, both in quantitative terms and subjective descriptions
Describe and quantify the resulting traffic generated from the proposed development. Assessment of modal split and trip assignment onto public highway.
Determine the likely opening year of the development and the design horizon.
Application of network traffic growth factors to traffic surveys for the opening year and design year.
Traffic assessments on key links and junctions within the study area to indentify reserve capacity and queue length thus determining the impact the development has on the surrounding road network
Information required
Traffic Surveys; Local public transport information, Topographical survey of local highway ;
Local planning standards; Local area plans; Planning history; Frozen schedule of accommodation; Frozen road layouts; TRICS Database
Assignment flow diagrams. Access to relevant computer software packages.
TIAAnalysis
Highways Impact Determination of the impact the development will have on the
local highways network using the following: OSCADY ARCADY PICADY LinSig AutoTrack
OSCADY (Isolated Signalised Junctions)
ARCADY (Roundabouts)
TIAAnalysis
LinSig(Multi Location Signalised Junctions)
PICADY(Priority Junctions
AutoTrack (Swept Path Analysis
TIAAnalysis
We also have access to more sophisticated computer software programmes such as:
VISSIM VISSUM COBA SATURN
VISSIM (MicroSimulation)
VISSUM (MacroSimulation)
TIACosts
Number of Units
Complexity Time to Complete Costs
50 Low; Junctions to be analyzed readily known and close to site access
4-5 days after receipt of frozen accommodation schedule and drawings
Up to £5,000 to include:•Scoping discussions•Drafting & geometric design of internal layout•Junction assessment and report
150 Low to medium; Junctions to be analyzed readily know and close to site access. In congested areas highway authority to be consulted.
7-10 days after receipt of frozen accommodation schedule and drawings
Up to £8,000 to include:•Scoping discussions•Drafting & geometric design of internal layout•Junction assessment and report
300 Medium; Pre-planning consultation with high authority with highway authority to confirm scope of report
Once pre planning meeting has taken place, up to 15 days after receipt of traffic surveys and/or frozen accommodation schedule and drawings
€10,000 -£12,000 to include:•Scoping discussions•Drafting & geometric design of internal layout•Junction assessment and report
500 High; Scoping of project of critical importance. Pre-planning consultation with high authority a must
Once pre planning meeting has taken place, up to 15-20 days after receipt of traffic surveys and/or frozen accommodation schedule and drawings
Up to £15,000 to include:•Scoping discussions•Drafting & geometric design of internal layout•Junction assessment and reportPlease Note:
1. It is assumed that the development meets with relevant local guidelines and that on three/four junctions in the immediate vicinity will need to be analysed, should further assessment or detailed micro simulation be required this will be subject to additional fees.
2. All drawings to be passed on to us in a frozen state. Any changes that require updating of our drawings/analysis will be subject to additional fees. 3. Additional meetings to be charged at agreed hourly rate and to include travel expenses.4. Progress will be via E-Mail or Telephone discussion. 5. Traffic surveys to be invoiced to client