Table 2: An optional list of estimation accuracy factors to highway project duration.

Code Factors Code Factors
x1 Project type x23 Horizontal and vertical alignment
x2 Project complexity x24 Typical section (Pavement thickness)
x3 Area location x25 Presence of curb, gutter & sidewalk
x4 Project location x26 Bridge type and complexity
x5 Project scope x27 Number of bridges in the project scope
x6 Project size (length) x28 Existence of waterbody and storm drain
x7 Contract type-payment method x29 The frequency of the project
x8 Tender selection strategy x30 Experience and grade of consultants
x9 Procurement method x31 Experience and grade of contractors
x10 Type of project deadline x32 Right-of-way acquisition cost costs
x11 Site topography/terrain type x33 Contractor’s need for the project
x12 Project capacity-number of lanes x34 Hauling distance
x13 Design AADT x35 Construction season-weather conditions
x14 Design speed x36 Type of soil at the construction sites
x15 Geometric design standard x37 Number of intersections
x16 Type of highway system x38 Project letting year
x17 Presence of a highway median x39 Fluctuation (price) measures
x18 Presence of loops and ramps x40 Financial (cash flow) condition
x19 Number of new signal count x41 Federal funding utilization
x20 Presence of crossover x42 Cost escalation (Rate of inflation)
x21 Site accessibility x43 Total project cost
x22 Intersection signalization and signage