UNITED REPUBLIC OF TANZANIA Prime Ministers Office for Regional Administration and Local Government The Dar es Salaam City Council ANNEX VOLUME 8 IMPACT ANALYSIS AND MITIGATION CHAPTER 8.1 Traffic Management During Construction Final Report CONSULTANCY SERVICES FOR THE CONCEPTUAL DESIGN OF A LONG TERM INTEGRATED DAR ES SALAAM BRT SYSTEM AND DETAILED DESIGN FOR THE INITIAL CORRIDOR Dar es Salaam June, 2007
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UNITED REPUBLIC OF TANZANIA Prime Ministers Office for Regional
Administration and Local Government
The Dar es Salaam City Council
ANNEX VOLUME 8 IMPACT ANALYSIS AND MITIGATION CHAPTER 8.1 Traffic Management During Construction Final Report
CONSULTANCY SERVICES FOR THE CONCEPTUAL DESIGN OF A LONG TERM INTEGRATED DAR ES SALAAM BRT SYSTEM AND DETAILED DESIGN FOR THE INITIAL CORRIDOR
2. GENERAL TRAFFIC MANAGEMENT STRATEGY ............................................... 2
2.1. ACCESS TO KIVUKONI TERMINAL AND MAGOGONI FERRY....................................... 2 2.2. SOKOINE DRIVE AND KIVUKONI FRONT ...................................................................... 3 2.3. CITY COUNCIL STATION ............................................................................................... 4 2.4. MOROGORO ROAD FROM CITY COUNCIL TO BIBI TITI.............................................. 4 2.5. MOROGORO ROAD FROM BIBI TITI ROAD TO UNITED NATIONS............................... 5 2.6. MOROGORO ROAD FROM UNITED NATIONS TO UBUNGO.......................................... 6
3. TRAFFIC MANAGEMENT ON INTERSECTIONS DURING CONSTRUCTION 16
3.1. INTERSECTION MOROGORO RD X BIBI TITI RD........................................................ 17 3.2. INTERSECTION MOROGORO RD X LUMUMBA ST ...................................................... 18 3.3. INTERSECTION MOROGORO RD X MSIMBAZI ST ...................................................... 20 3.4. INTERSECTION MOROGORO X UNITED NATIONS ...................................................... 22 3.5. INTERSECTION MOROGORO X JANGWANI................................................................. 24 3.6. MAGOMENI MAPIPA U TURN INTERSECTION............................................................ 26 3.7. MOROGORO ROAD X KAWAWA ROAD INTERSECTION............................................. 27 3.8. BAKHERESA U TURN INTERSECTION ......................................................................... 30 3.9. MABIBO ENTRANCE INTERSECTION........................................................................... 32 3.10. SHEKILANGO ROAD INTERSECTION......................................................................... 33 3.11. MOROGORO X SAM NUJOMA/MANDELA INTERSECTION ....................................... 36
LIST OF FIGURES
FIGURE 1 TRAFFIC MANAGEMENT ON KIVUKONI FRONT _____________________________________3 FIGURE 2 PROPOSED CITY COUNCIL STATION _____________________________________________4 FIGURE 3 MOROGORO ROAD ALONG CBD________________________________________________5 FIGURE 4 TRAFFIC MANAGEMENT – MOROGORO ROAD – BIBI TITI TO UNITED NATIONS ____________6 FIGURE 5 TRAFFIC MANAGEMENT – MOROGORO ROAD- UNITED NATIONS TO UBUNGO_____________7 FIGURE 6 TRAFFIC MANAGEMENT – MOROGORO ROAD- UBUNGO TO KIBO ______________________8 FIGURE 7 TRAFFIC MANAGEMENT – MOROGORO ROAD- KIBO TO KIMARA THOMAS ______________10 FIGURE 8 TRAFFIC MANAGEMENT – KAWAWA ROAD- MOROGORO RD JUNCTION TO MKWAJUNI_____12 FIGURE 9 TRAFFIC MANAGEMENT – KAWAWA ROAD- MKWAJUNI TO MOROCCO TERMINAL ________13 FIGURE 10 TRAFFIC MANAGEMENT – MSIMBAZI ROAD- MOROGORO RD JUNCTION TO UHURU ST
JUNCTION ___________________________________________________________________14 FIGURE 11 BIBI TITI ROAD INTERSECTION _______________________________________________17 FIGURE 12 BIBI TITI ROAD INTERSECTION / MOROGORO ROAD CONSTRUCTION PHASES ___________18 FIGURE 13 LUMUMBA STREET INTERSECTION ____________________________________________19 FIGURE 14 LUMUMBA STREET INTERSECTION / MOROGORO ROAD CONSTRUCTION PHASES_________19 FIGURE 15 MSIMBAZI STREET INTERSECTION ____________________________________________20 FIGURE 16 MSIMBAZI STREET INTERSECTION / MOROGORO ROAD CONSTRUCTION PHASES _________21 FIGURE 17 UNITED NATIONS ROAD INTERSECTION ________________________________________22 FIGURE 18 UNITED NATIONS ROAD INTERSECTION EAST / MOROGORO ROAD CONSTRUCTION PHASES 23 FIGURE 19 UNITED NATIONS ROAD INTERSECTION WEST / MOROGORO ROAD CONSTRUCTION PHASES24 FIGURE 20 JANGWANI ENTRANCE INTERSECTION _________________________________________24
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FIGURE 21 JANGWANI ENTRANCE INTERSECTION EAST / MOROGORO ROAD CONSTRUCTION PHASES _25 FIGURE 22 JANGWANI ENTRANCE INTERSECTION WEST / MOROGORO ROAD CONSTRUCTION PHASES _26 FIGURE 23 MAGOMENI MAPIPA U TURN INTERSECTION ____________________________________26 FIGURE 24 U TURN INTERSECTION AT MAGOMENI MAPIPA/ MOROGORO ROAD CONSTRUCTION PHASES
___________________________________________________________________________27 FIGURE 25 KAWAWA ROAD INTERSECTION ______________________________________________28 FIGURE 26 KAWAWA INTERSECTION / KAWAWA ROAD CONSTRUCTION PHASES _________________29 FIGURE 27 KAWAWA INTERSECTION / MOROGORO ROAD CONSTRUCTION PHASES________________30 FIGURE 28 BAKHERESA U TURN INTERSECTION __________________________________________31 FIGURE 29 U TURN INTERSECTION AT BAKHERESA/ MOROGORO ROAD CONSTRUCTION PHASES _____32 FIGURE 30 MABIBO ENTRANCE INTERSECTION ___________________________________________32 FIGURE 31 U TURN MABIBO ENTRANCE/ MOROGORO ROAD CONSTRUCTION PHASES _____________33 FIGURE 32 SHEKILANGO ROAD INTERSECTION ___________________________________________35 FIGURE 33 SHEKILANGO ROAD/ MOROGORO ROAD CONSTRUCTION PHASES ____________________35 FIGURE 34 SAM NUJOMA/MANDELA INTERSECTION _______________________________________36 FIGURE 35 SAM NUJOMA/NELSON MANDELA ROAD CONSTRUCTION AND TRAFFIC MANAGEMENT –
PHASE 1 ____________________________________________________________________37 FIGURE 36 SAM NUJOMA/NELSON MANDELA ROAD CONSTRUCTION AND TRAFFIC MANAGEMENT –
PHASE 2 ____________________________________________________________________38 FIGURE 37 SAM NUJOMA/NELSON MANDELA ROAD CONSTRUCTION AND TRAFFIC MANAGEMENT –
PHASE 3 ____________________________________________________________________38 FIGURE 38 SAM NUJOMA/NELSON MANDELA ROAD CONSTRUCTION AND TRAFFIC MANAGEMENT –
PHASES _____________________________________________________________________40 FIGURE 40 KAWAWA ROAD AND ALI HASSAN / BAGAMOYO ROAD INTERSECTION________________42 FIGURE 41 MSIMBAZI AND UHURU ST. INTERSECTION – CONSTRUCTION STEP 1 __________________44 FIGURE 42 MSIMBAZI AND UHURU ST. INTERSECTION – CONSTRUCTION STEP 2 __________________44 FIGURE 43 MSIMBAZI AND UHURU ST. INTERSECTION – CONSTRUCTION STEP 3 __________________45
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ACRONYMS AND ABBREVIATIONS
BRT: Bus Rapid Transit DART: Dar Rapid Transit DCC: Dar es Salaam City Council DSM: Dar es Salaam
1 Impact Analysis – Traffic Management During Construction
1. INTRODUCTION
No road construction impacts can be completely avoided on the traffic, but a
detailed construction schedule combined with a good traffic management can
minimize those impacts. The objective of this document is to give tolls for the
mentioned impact reduction to be achieved.
For road infrastructure construction proposed for DART system, there will be no
traffic diversion during construction. There are no alternative roads that could be
used to close parts of Morogoro Road, thus the construction strategy needs to be
attached to this reality.
The diversion of traffic will be done on the right of way of the road construction
setting the restrictions on the strategy for construction.
Only along the downtown stretch of Morogoro Road the traffic diversion is
necessary as all the road needs to be closed for construction. As the road will be
closed to general traffic in the future, the diversion will be necessary anyway.
It is necessary to understand that this work is a general recommendation that
needs to be adjusted or even totally changed for the construction company. They
have their own technology and will be asked to present this on their work plan.
2 Impact Analysis – Traffic Management During Construction
2. GENERAL TRAFFIC MANAGEMENT STRATEGY
There are no alternatives for traffic diversion in Dar es Salaam. Because of this,
traffic needs to be managed in the same space.
The general strategy is to build the extra space and keep moving traffic to the
available space as construction advances and it is assumed that the construction
companies will work on stretches of two stations at each time.
Changes on the traffic should be done at night during weekends or holidays and
a clear and sufficient signalization will make drivers more comfortable with the
changes improving traffic flow.
In CBD, traffic management must be implemented right at the beginning to
liberate space for constructing Morogoro Road (from City Council to Bibi Titi),
Sokoine Drive and Kivukoni Front.
Non motorized transportation flow, although not specifically handled in this
document, must be equally carefully analyzed to ensure pedestrians safety and
to avoid additional interferences on the motorized traffic during construction.
Regarding infrastructure, flexible pavement will be constructed till the base,
leaving the top finishing to the end. Rigid pavement will be completed at once.
It is important to enforce in the constructor the application of safety measures as
well as environmental protection programs based on the impacts depicted and
identified in the Environmental Assessment Analysis work done for the project
implementation.
2.1. ACCESS TO KIVUKONI TERMINAL AND MAGOGONI FERRY
The road will gain an extra width towards the daladala terminal area.
At the first moment, the now available infrastructure will remain untouched and
available for the traffic as it is now, building the extra road width (Figure 1).
3 Impact Analysis – Traffic Management During Construction
When the new lanes have been built, traffic will be diverted to this new space so
to construct on the present road space. The daladala terminal has to be built at
the same time.
When the construction of the access is completed, all traffic will be changed to
the final situation for the project, liberating Sokoine drive and Kivukoni front from
the daladala traffic.
2.2. SOKOINE DRIVE AND KIVUKONI FRONT
As the daladala flow will be diverted a priori, two lanes will be left for the general
traffic while the base for one of the BRT lanes and the bicycle lane is built. Then
traffic will be diverted to these new built lanes and the other BRT lane and the
general traffic lane will then be fully built. Traffic will again be diverted to the
newly built lanes and the BRT and bike and walkway will be finished.
Figure 1 Traffic Management on Kivukoni Front
4 Impact Analysis – Traffic Management During Construction
2.3. CITY COUNCIL STATION
City Council station will not represent any problem as it is outside the road.
Anyway, some concern needs to be done if there is going to be an integrated
development at this place. Any development that takes place at the City Council
plot needs to have underground parking not only for the development but also for
the general public (Figure 2).
Figure 2 Proposed City Council Station
2.4. MOROGORO ROAD FROM CITY COUNCIL TO BIBI TITI
After all traffic management measures are implemented along the stretch
comprised between Kivukoni and Bibi Titi Road, construction activities will take
place on Morogoro Road.
Special attention must be taken at intersections to avoid, as much as possible,
interferences on the already rearranged traffic. Traffic flow along the cross
streets from Bibi Titi Road to Sokoine Drive can be restricted to a one way lane,
which in most cases is the current flow condition, to facilitate traffic management.
5 Impact Analysis – Traffic Management During Construction
Figure 3 presents the Morogoro Rd crossing streets along CBD.
Figure 3 Morogoro Road along CBD
2.5. MOROGORO ROAD FROM BIBI TITI ROAD TO UNITED NATIONS
The construction could be made in four steps (Figure 4):
Build the extra lane at one side of the road.
Leave the traffic on the space enough for four lanes at one side of the
road (the space for the bicycle lane is used as one car lane). Build on the
space left including sidewalks and bicycle lanes.
Leave four lanes space on the other side and finish the space on the
other side.
Use the two BRT lanes and two general traffic lanes for circulation and
finish the other side of the road.
6 Impact Analysis – Traffic Management During Construction
Figure 4 Traffic Management – Morogoro Road – Bibi Titi to United Nations
This stretch will also include the extension of the Jangwany Bridge and two other
box culverts, which will follow a similar construction strategy as the general
roadwork. Foundations and structure of the extended bridge or culvert will be first
built on both sides without disturbing the existing structure or the traffic. After
they are concluded and connected to the existing structure, traffic management
will follow the same strategy described above. Construction of these structures
should be done before the adjacent road stretches avoiding these particular
points to be converted to bottlenecks.
2.6. MOROGORO ROAD FROM UNITED NATIONS TO UBUNGO
This section will be built also in four steps (Figure 5):
Build the extra space at one side of the road.
Leave the traffic on the space enough for four lanes at one side of the
road (the space for the bicycle lane is used as one car lane). Build on the
space left including sidewalks and bicycle lanes.
7 Impact Analysis – Traffic Management During Construction
Leave four lanes space on the other side and finish the space on the
other side.
Build the final BRT lanes on the middle and leave traffic flow on the final
section.
Figure 5 Traffic Management – Morogoro Road- United Nations to Ubungo
2.7. UBUNGO DALADALA TERMINAL
Since some improvements will take place at the daladala terminal at Ubungo,
existing activities will have to be temporally relocated.
As described on volume V8.1 – Traffic Management During Construction, at the
junction, construction activities will be first be addressed at Sam Nujoma Rd /
Nelson Mandela Rd and once finished, daladalas will be temporary located at the
space provided for the U-turns. Construction activities can then take place at the
terminal
After the terminal is finished, daladalas operations will return to the now final
facilities.
8 Impact Analysis – Traffic Management During Construction
2.8. MOROGORO ROAD FROM UBUNGO TO KIBO
Service roads facilities will play an important role during construction since it will
accommodate part of diverted traffic, allowing activities to take place at the main
corridor. The construction steps are shown on table 6 and described above.
Figure 6 Traffic Management – Morogoro Road- Ubungo to Kibo
Construction phases:
Divert part of the traffic, preferably of light vehicles, to one lane
provided at the service road and leave only the outer lane for
remaining traffic at main corridor. At this time rigid pavement will be
constructed at the center of the road.
Move traffic running on the main corridor to newly built concrete
lanes allowing final flexible pavement to be built
9 Impact Analysis – Traffic Management During Construction
Divert the traffic to the final section. The new drainage system will be
set and existing ditches will be filled so that bikeway an walkway can
be constructed over it
2.9. MOROGORO ROAD FROM KIBO TO KIMARA THOMAS
On this stretch the proposed cross section is confined between the existing
drainage ditches, allowing the service roads to accommodate the diverted traffic.
The Construction will take place in 2 steps at this stretch as follows:
Provide one lane, preferably for light vehicles, at the service road for
part of diverted traffic. At the main road, the outside lane will remain
operating while construction of rigid pavement takes place at the
center lanes
Divert the traffic of the main road to the newly built concrete lanes
and concentrate the construction activities on the outer lanes,
walkways and bikeways construction.
10 Impact Analysis – Traffic Management During Construction
Figure 7 Traffic Management – Morogoro Road- Kibo to Kimara Thomas
After the above described phases are concluded, traffic will be placed at its final
location.
2.10. MOROGORO ROAD FROM KIMARA THOMAS TO KIMARA TERMINAL
At this stretch no service road is provided and the terrain characteristics makes it
difficult to build an extra space. The existing shoulders will be used therefore.
The construction activities will take place in 4 phases as follows:
Remove existing interruptions on the shoulders (i.e. curbstones just
before existing bus bays) at both side of the road to provide a new
traffic lane.
11 Impact Analysis – Traffic Management During Construction
Divert the traffic to the space formed by existing outer lane and
shoulder allowing construction of rigid pavement activities to take
place at the center lanes
At one of directions, accommodate the traffic on both concrete lanes
while construction takes place on the flexible pavement lane
(existing outer lane)
Accommodate one way of the traffic at the shoulder and newly built
asphalt lane and the other way on both concrete lanes. Construction
will take place at the asphalt lane and walkway/bikeway
construction.
Accommodate the traffic on the final lanes and build the remaining
walkway/bikeway.
2.11. KAWAWA ROAD FROM MOROGORO JUNCTION TO MKWAJUNI
This section will be built in three phases as described bellow and shown on figure
8:
Use the space in the median and reduce the existing walkways by
the designed new alignment to provide space for four traffic lanes at
one side of the road and divert traffic to this space. Construction will
focus on the whole construction of the opposite side of the road
(mixed traffic lanes and bikeways/walkways facilities)
Move one way of the traffic to the newly built mixed traffic lanes
allowing activities to take place at the middle of the road for concrete
lanes construction
Move the traffic running on the existing pavement to the concrete
lanes and finalize remaining section. After concluded, traffic is
placed at its designed position
12 Impact Analysis – Traffic Management During Construction