Design process

From initial project stages through to street operation, a transparent process is necessary to deliver sustainable, safe, and comfortable streets. The implementing agency can begin by discussing the project concept with stakeholders to build consensus on the required interventions. Bidding documents are then prepared and issued to select the design consultants.

Based on the city vision and on existing plans, a data collection stage follows, including surveys of the topography, utilities, land uses, parking demand, and non-motorised transport and traffic volumes. In addition, analysis of crash data can reveal road safety black spots. The gathered data inform the street designs, which are reviewed and evaluated to incorporate feedback. The designer should present the concept designs to stakeholders and incorporate the feedback while preparing the detailed designs. The municipality, with support from other agencies, reviews and approves the final designs, according to which the contract is awarded for construction.

Once completed, the intervention street is handed over to the municipality for inauguration, operation, and maintenance. Streets should be maintained regularly and as required when damage occurs.

Data collection

At the onset of the design process, it is key that the designer consult relevant government agencies and gather data about street conditions. Such information may include the following:

Review of existing transport and land use plans

The designer is required to compile spatial information on existing transport plans, including bus rapid transit (BRT) networks, cycle networks, pedestrian networks, and pedestrian zones. The designer should also identify transport system goals that are stated in these reports.

Topographic survey

The purpose of a topographic survey is to collect data on the project site including all the existing features. The designer should supplement the topographic survey with information on underground utility networks obtained from the client.

Underground utility survey

It is necessary to conduct detailed surveys of underground utilities to establish the location of specific utility lines and determine whether relocation is necessary. These utilities may include lines for telecommunication, electricity, natural gas, water, and sewage.

Survey of land uses

The designer should compile land use information to help inform street design decisions. A land use survey must be carried out for every building in the study area. The land use analysis should note important activity generators, such as shopping areas, theatres, and housing developments. All land use data should be recorded using a GIS platform.

Stakeholder participation

Public participation aims at promoting transparency in decision making, facilitating public awareness, promoting public ownership of projects, and encouraging collaboration in governance processes. Public participation is, therefore, a key step in the street design process. The project team should inform all stakeholders of the planned developments and to seek their input into the designs.

Existing NMT condition survey

Key to designing quality and effective non-motorised transport (NMT) network is to have an in-depth understanding of the existing walking and cycling environment, and the extent to which it provides safe, convenient access for NMT users. Street conditions can be captured using a smartphone application. The app allows a surveyor to record street characteristics and remotely upload the information to an online spreadsheet. The data from these surveys are then cleaned, mapped, and analysed to inform preliminary interventions along the surveyed streets.

Survey of NMT user movements:

Information on NMT volumes on each street can help inform the design and sizing of pedestrian and cycle facilities. There are a range applications available online which can be used for NMT counts, including Device Magic and Multiple Counter. NMT surveys should be disaggregated by gender, age, and disability.

Traffic counts

Data obtained through a traffic survey is necessary for intersection design and signal timing optimisation. The traffic survey quantifies vehicle movements, including non-motorised user movements. Traffic surveys should be conducted during peak periods when motorised traffic is and demand for space is highest. Counts can be conducted manually on site or by video recording using cameras. The count should be categorised by vehicle type.

Parking survey

In most urban areas, parking appears crowded and chaotic in some areas, creating the impression of an overall shortage, yet there could be several unused parking spaces within reasonable walking distance. A parking survey reveals such imbalances, and appropriate measures can be included in the street design to improve parking efficiency on the street. A parking survey seeks to quantify current parking patterns in the project area by collecting data on the existing parking capacity and demand. Three types of surveys should be carried out:

  • Parking inventory survey: The first step involves recording the number of parking spaces in onstreet and off-street facilities.
  • Occupancy survey: The second step involves counting the number of vehicles parked on each street segment or off-street parking facility over the course of the day. These counts can be used along with the supply data gathered in the first step to calculate occupancy rates.
  • Turnover survey: Turnover data can help determine what types of users are parking in a particular facility (e.g., all-day parking by office-goers, short-term parking by shoppers, etc.)
Street vending and related activities survey

The designer must document existing vending activity, including the type of vending and the physical typology of the vending structure (i.e. permanent or temporary structure). The location and characteristics of each vendor should be recorded using GIS.The survey also should capture social gathering spaces in the study area. This information will inform the placement of street furniture and other elements in the final design.

Analysis of crash data

The designer should obtain data from the Federal Transport Authority and the police on traffic crashes over the past 3 years. The crash location, type, and users involved (i.e. pedestrian, cyclist, two wheeler, car, bus, etc) should be mapped using a GIS platform. This information will enable the designer to identify major traffic safety “black spots” and suggest traffic calming, intersection modifications, and other interventions to improve safety for vulnerable street users.

Right-of-way

City management or relevant road authorities may be in a position to provide the available right-of-way (ROW) widths. In addition, maps showing precise, geocoded locations of the public right-of-way may be obtained.

Consultation with utility providers

Any existing utilities within the project area should be identified during the early stages of design. Utility providers may have information on existing utility networks. Discussions with relevant utility providers should be held to agree on any necessary relocations or on the installation of a service duct. It is advisable to maintain communication with the providers as the design progresses and also during project implementation. The designer should obtain any necessary approvals from utility providers for planned relocations.

Street design preparation

Formulation of a complete design of the selected street/s by private consultants, government or in collaborated effort should be based on street design standards, the TOR, and RFP. The street design preparation includes at least three sub-steps: draft, final draft and final design preparation.

The first two sub-steps shall be followed by review, evaluation, and comments on the respective outputs. The final design shall address the comments on the draft and draft final outputs. The team of professionals preparing the designs shall consist of architects, landscape architects/planners’ urban planners/designers, engineers, environmentalists, sociologists, economists, and consultants of different categories as applicable.

Review & approval

The design of streets shall be approved by city administration and/or municipality before proceeding to construction. Urban centres could have assistance from regional and federal institutions, consultants or other bodies as applicable to have street designs reviewed and approved. The designs shall be accompanied with plans of actions, financing, funding sources and budget. Required street plans, designs, drawings and reports as applicable shall be submitted to the city administration and municipality for approval. The city administration and municipality shall have the right to reject or approve the design submitted for approval. The rejected designs shall be returned together with the reasons for the rejection. If designs could be improved comments shall be given to the designers.

Project identification and conceptualisation

At the onset of the design process, it is key that the designer consult relevant government agencies and local stakeholders to understand challenges on the site and to brainstorm on potential solutions.

Stakeholder participation

Public participation aims at promoting transparency in decision making, facilitating public awareness, promoting public ownership of projects, and encouraging collaboration in governance processes. Public participation is, therefore, a key step in the street design process. The project team should inform the stakeholders of the planned developments and to seek their input into the designs. It is important to engage all key stakeholders including:

  • National ministry responsible for transport
  • Municipal roads and transport department
  • Municipal planning department
  • National roads authority
  • National safety authority
  • Environmental management authority
  • Public transport operators
  • Street vendors
  • Business community
  • Persons with disabilities
  • Donor agencies and development partners
  • NGOs in the transport sector
  • Utility providers (e.g., water, electricity, telecommunications)

This step includes development of a vision and documentation of steps to be taken by the city administration, utility agencies, stakeholders and the community. The project proponents negotiate with the stakeholders and reach consensus on the preferred approach.

Preparation of design TOR

This step involves using the background information gathered in the first step above as well as the outcomes from the stakeholder consultations to prepare a terms of reference for the hiring of design consultants. The implementing agency then issues the tender, completes the selection process, and issues a contract to the selected consultant. The consultant then works with the implementing agency on the following activities. As an alternative, the implementing agency could prepare the designs in-house.

Data collection

The designer should collect primary and secondary information about site conditions, including the following:

It is useful to have a brainstorming session with key city officials to understand their vision for the city. A workshop can be held to explore the best suited options to achieve a comfortable, safe and user-friendly street environment.

The designer is required to compile spatial information on existing transport plans, including bus rapid transit (BRT) networks, cycle networks, pedestrian networks, and pedestrian zones. The designer should also identify transport system goals that are stated in these reports.

The purpose of a topographic survey is to collect data on the project site including all the existing features. The designer should supplement the topographic survey with information on underground utility networks obtained from the client.

It is necessary to conduct detailed surveys of underground utilities to establish the location of specific utility lines and determine whether relocation is necessary. These utilities may include lines for telecommunication, electricity, natural gas, water, and sewage.

Any existing utilities within the project area should be identified during the early stages of design. Utility providers may have information on existing utility networks. Discussions with relevant utility providers should be held to agree on any necessary relocations or on the installation of a service duct. It is advisable to maintain communication with the providers as the design progresses and also during project implementation. The designer should obtain any necessary approvals from utility providers for planned relocations.

The designer should compile land use information to help inform street design decisions. A land-use survey must be carried out for every building in the study area. The land use analysis should note important activity generators, such as shopping areas, theatres, and housing developments. All land use data should be recorded using a GIS platform.

The key to designing a quality and effective non-motorised transport (NMT) network is to have an in-depth understanding of the existing walking and cycling environment, and the extent to which it provides safe, convenient access for NMT users. Street conditions can be captured using a smartphone application. The app allows a surveyor to record street characteristics and remotely upload the information to an online spreadsheet. The data from these surveys are then cleaned, mapped, and analysed to inform preliminary interventions along the surveyed streets.

Download the NMT  audit checklist and the NMT facility audit form for detailed and comprehensive data collection.

Information on NMT volumes on each street can help inform the design and sizing of pedestrian and cycle facilities. A range of applications online which can be used for NMT counts, including Device Magic and Multiple Counter. NMT surveys should be disaggregated by gender, age, and disability.

Download the NMT count survey form  and the NMT perception survey form for detailed and comprehensive data collection.

Data obtained through a traffic survey is necessary for intersection design and signal timing optimisation. The traffic survey quantifies vehicle movements, including non-motorised user movements. Traffic surveys should be conducted during peak periods when motorised traffic is and demand for space is highest. Counts can be conducted manually on-site or by video recording using cameras. The count should be categorised by vehicle type.

ERA, the Federal Integrated Infrastructure Development and Construction Authority (FIIDCA), and regional sources can provide information on national and regional roads, which should be integrated with the proposed urban street network per local urban plans. Similarly, data on roads connecting urban areas to the rural kebeles in the hinterland areas shall be collected from existing situation studies.

Parking appears crowded and chaotic in some urban areas creating the impression of an overall shortage yet there could be several unused parking spaces within reasonable walking distance. A parking survey reveals such imbalances, and appropriate measures can be included in the street design to improve parking efficiency on the street. A parking survey seeks to quantify current parking patterns in the project area by collecting data on the existing parking capacity and demand. Three types of surveys should be carried out:

  1. Parking inventory survey: The first step involves recording the number of parking spaces in on-street and off-street facilities.
  2. Occupancy survey: The second step involves counting the number of vehicles parked on each street segment or off-street parking facility over the course of the day. These counts can be used along with the supply data gathered in the first step to calculate occupancy rates.
  3. Turnover survey: Turnover data can help determine what types of users are parking in a particular facility (e.g., all-day parking by office-goers, short-term parking by shoppers, etc.)

Download the on-street parking occupancy survey form for detailed and comprehensive data collection.

The designer must document existing vending activity, including the type of vending and the physical typology of the vending structure (i.e., permanent or temporary structure). The location and characteristics of each vendor should be recorded using GIS. The survey also should capture social gathering spaces in the study area. This information will inform the placement of street furniture and other elements in the final design.

The designer should obtain data from the police on traffic crash over the past 3 years. The crash location, type, and users involved (i.e. pedestrian, cyclist, two-wheeler, car, bus, etc) should be mapped using a GIS platform. This information will enable the designer to identify major traffic safety “black spots” and suggest traffic calming, intersection modifications, and other interventions to improve safety for vulnerable street users.

City management or relevant road authorities may be in a position to provide the available right-of-way (ROW) widths. In addition, maps showing precise, geocoded locations of the public right-of-way may be obtained.

To document existing public transport routes and services, data on the public transport services within the project area should be collected and mapped. All paratransit and bus stops within the project area also should be mapped. The designer should gather additional information on planned public transport projects within the project area from relevant bodies.

Street design preparation

Next, the consultant prepares the complete design of the selected street/s based on street design standards and the TOR. The street design preparation includes at least three sub-steps: draft designs, draft final designs, and final designs. The first two sub-steps shall be followed by review, evaluation, and comments on the respective outputs from a diverse set of stakeholders. The final design shall address the comments on the draft and draft final outputs.

The team of professionals preparing the designs shall consist of architects, landscape architects/ planners’ urban planners/designers, engineers, environmentalists, sociologists, economists, and consultants of different categories as applicable.

Integration

This step includes preparation of plans for integration of activities and provision of financing support among the local government, utility providing agencies, and the community. This step shall include detailing the contribution of each stakeholder and preparing a breakdown of funding sources and phasing of release.

Review and approval

The design of streets shall be approved by city administration and/or municipality before proceeding to construction. Urban centres can seek design review assistance assistance from regional and federal institutions, consultants or other bodies as applicable. The designs shall be accompanied with plans of actions, financing, funding sources, and budgets. Required street plans, drawings, and reports as applicable shall be submitted to the city administration and municipality for approval. The city administration and municipality shall have the right to reject or approve the design submitted for approval. The rejected designs shall be returned together with the reasons for the rejection. If designs could be improved comments shall be given to the designers.

Tendering, contract award, administration, construction, and handover

The construction of streets shall be carried out in accordance with the approved and adopted designs.

Operation and maintenance

Streets are valuable public property. To give sustainable services they have to be managed properly and protected from improper use and abuse. Therefore, they have to be administered and also owned by a public body with clear mandates. City administrations and municipalities shall manage the operation and maintenance of urban streets.

Streets shall be maintained regularly every two years and also as required when damage occurs. If damage is caused by crashes or actions of users, those who caused the damage shall be made accountable and cover the cost of maintenance. The required regulation and working procedure shall be defined and enforced. There is a need to support high-quality construction and maintenance of streets by establishing an infrastructure budgeting system and an urban infrastructure fund (MUDH, 2014).

Download data collection survey templates

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NMT Audit checklist

for detailed and comprehensive data
collection.

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NMT facility audit form (JSON format)

This survey covers footpath presence and quality; presence of crossing facilities and traffic calming; parking, vending; universal access elements; and cycle facilities. The survey form is filled out once per block.

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NMT count survey form

Survey form for NMT cordon counts with disaggregation by gender, disability, and age

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On-street parking occupancy survey form

This survey records the number of vehicles parked on each block, classified by type. The data can be used to calculate the parking occupancy rates.

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NMT perception survey form

This survey seeks to gather input on perceptions about the walking and cycling environment and views on priority improvements.

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