Determination of Road Maintenance Needs

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Determination of Road Maintenance Needs
March, 2007 Eng. David S. Luyimbazi
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Introduction

• Road maintenance needs determined using PAM
  RED
• Input information derived primarily from road
  inventory, traffic and condition data
• Results are only indicative.

• Model inputs -
• National Roads Inventory
• National Roads Traffic
• National Roads Condition
• Vehicle Operating Costs
• Pavement Design Life.

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Homogeneous Road Network Matrix
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Road Condition Profile by Surface Type
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Routine Periodic Mtce Costs
Routine Maintenance Costs (US/km)
Periodic Maintenance Costs (1000 US/km)
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VOC input data for RED Model
US/Km
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Aggregated average traffic levels
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Pavement Design Life (Years)
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Results of PAM analysis
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Maintenance Requirements (mil. US)
Scenario 1 Existing Situation
Scenario 2 - Desirable

• Routine 24.92
• Paved 4.26
• Unpaved 20.65
• Periodic 47.07
• Paved 10.11
• Unpaved 36.95

• Routine 11.76
• Paved 3.05
• Unpaved 8.71
• Periodic 38.43
• Paved 9.48
• Unpaved 28.96

• Total 71.99

• Total 50.19

Maintenance Cost Savings US 21.8
NOTE Current Maintenance funding US 40m/year
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Vehicle Operating Costs (mil. US)
Scenario 1 Existing Situation
Scenario 2 - Desirable

• Gravel 238.96
• Paved 521.56

• Gravel 197.03
• Paved 493.55

• Total 760.52

• Total 690.59

VOC Savings US 69.93

• Equivalent to 1.5 of National GDP,
• Extra US 251.45 per motorist annually.

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Impact of Funding Deficits
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Impact of Funding Deficits - Backlog

• From chart above, every US1 of maintenance held
  back, each road user incurs US 3.58 in VOCs

• Current funding of US 40m represents D40
• Road maintenance backlog _at_ 4,429km
• Shortfall of US 22 mn wrt existing scenario.

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Conclusion

• It is less costly for both Government and Road
  Users if roads are in good condition
• Inadequate funding can only lead to loss of
  investment in roads (asset value US 2.7 Bn),
  increased transport costs (and backlog) and
  negative impact on economy
• Increase of road maintenance needs attributed to
  increased motorization, increased network size,
  recurring shortfalls in funding wrt needs, etc
• For every US 1 not provided for maintenance, road
  users are forced to spend an extra US 3.6!!!