U.S. Department of Transportation
Federal Highway Administration
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Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations
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Publication Number: FHWA-HRT-07-046
Date: August 2007 |
Model Minimum Inventory of Roadway Elements—MMIREPDF Version (1.09 MB)
PDF files can be viewed with the Acrobat® Reader® APPENDIX C. PROPOSED MMIRE ELEMENT CODINGThe following describes the proposed MMIRE elements. In each case, the element name is in bold, followed by a brief definition of the element, the attributes (proposed coding), and the source of coding. The latter will be one or more of the four primary data sources or the project team. The elements are numbered for cross-referencing with the same element in the Appendix B matrix. I. ROADWAY SEGMENT DESCRIPTORS I.A. SEGMENT LOCATION/LINKAGE VARIABLES (Note that whatever linear reference or spatial variables are used, they must be consistent across all safety data files.) 1. COUNTY Definition: County location of segment Attributes:
Source of Coding: Project Team 2. CITY/LOCAL JURISDICTION Definition: City/local jurisdiction location of segment if applicable Attributes:
Source of Coding: Project Team 3. ROUTE NUMBER Definition: Route number Attributes:
Source of Coding: SafetyAnalyst 4. STREET NAME Definition: Street name Attributes:
Source of Coding: All sources 5. SECTION END-POINTS DESCRIPTORS Definition: Location information defining the location on a route of each endpoint of the section Attributes:
Source of Coding: All sources 6. SECTION IDENTIFIER Definition: Unique segment identifier, derived from other variables (e.g., combination of route number, county location and beginning and ending mileposts) Attributes:
Source of Coding: All sources 7. SECTION LENGTH Definition: Section length Attributes:
Source of Coding: All sources 8. HIGHWAY DISTRICT Definition: Highway district Attributes:
Source of Coding: SafetyAnalyst 9. GOVERNMENTAL OWNERSHIP Definition: Governmental owner of segment (including FIPS code) Attributes:
Source of Coding: Project Team 10. TYPE OF GOVERNMENTAL OWNERSHIP Definition: Type of governmental ownership Attributes:
Source of Coding: HPMS 11. ROUTE SIGNING Definition: Type of route signing on the segment Attributes:
Source of Coding: HPMS 12. ROUTE SIGNING QUALIFIER Definition: Whether the route is "business" or other qualifier Attributes:
Source of Coding: HPMS 13. COINCIDING ROUTE INDICATOR Definition: Whether the route segment is a "primary" coinciding route (i.e., the route that crashes are referenced to) or a "minor" coinciding route Attributes:
Source of Coding: Project Team 14. COINCIDING-ROUTE PRIMARY ROUTE NUMBER Definition: If a minor conciding route segment, the route number for the major (primary) route Attributes:
Source of Coding: SafetyAnalyst 15. DIRECTION OF INVENTORY Definition: Direction of Inventory Attributes:
Source of Coding: Project Team I.B. SEGMENT ROADWAY CLASSIFICATION 16. FUNCTIONAL CLASS Definition: Functional class Attributes:
Source of Coding: HPMS, IHSDM 17. RURAL/URBAN DESIGNATION Definition: Rural/urban designation Attributes:
Source of Coding: SafetyAnalyst 18. FEDERAL AID/ ROUTE TYPE Definition: Federal aid/route type Attributes:
Source of Coding: HPMS 19. ACCESS CONTROL Definition: Access control Attributes:
Source of Coding: All sources 20. OPERATIONAL CLASS Definition: Operational class of segment if different from offical functional class Attributes:
Source of Coding: HPMS, IHSDM I.C. SEGMENT CROSS SECTION I.C.1. SURFACE DESCRIPTORS 21. SURFACE TYPE Definition: Surface type Attributes:
Source of Coding: SafetyAnalyst 22. SURFACE FRICTION Definition: Surface friction indicator Attributes:
Source of Coding: Project Team 23. SURFACE FRICTION DATE Definition: Date surface friction was measured or assigned Attributes:
Source of Coding: Project Team 24. TOTAL SURFACE WIDTH Definition: Total paved surface width (could be derived if all other lane widths are captured) Attributes:
Source of Coding: All sources 25. PAVEMENT ROUGHNESS/CONDITION Definition: Pavement roughness (roughness number) Attributes:
Source of Coding: HPMS 26. PAVEMENT ROUGHNESS DATE Definition: Date pavement roughness was assigned Attributes:
Source of Coding: Project Team 27. PAVEMENT CONDITION Definition: Pavement condition (descriptive scale) Attributes:
Source of Coding: HPMS 28. PAVEMENT CONDITION DATE Definition: Date pavement condition was assigned Attributes:
Source of Coding: Project Team I.C.2. LANE DESCRIPTORS 29. NO. OF THRU LANES Definition: Number of thru lanes, including HOV and reversible lanes Attributes:
Source of Coding: All sources 30. AVERAGE THRU LANE WIDTH Definition: Average lane width used by traffic (i.e., not including wide curb lanes, parking area, bicycle lanes, etc.) Attributes:
Source of Coding: All sources 31. EXCLUSIVE LEFT TURN LANE PRESENCE Definition: Exclusive left turn lane presence and number for both divided and undivided roadways. Supplemental information on left turn lane type in medians of divided roadways (e.g.,directional left turn lane) is captured under Median Descriptors Attributes:
Source of Coding: Project Team 32. EXCLUSIVE LEFT TURN LANE LENGTH Definition: Exclusive left turn lane length Attributes:
Source of Coding: Project Team 33. EXCLUSIVE RIGHT TURN LANE PRESENCE Definition: Exclusive right turn lane presence and number Attributes:
Source of Coding: Project Team 34. EXCLUSIVE RIGHT TURN LANE LENGTH Definition: Exclusive right turn lane length Attributes:
Source of Coding: Project Team 35. AUXILIARY LANE PRESENCE/TYPE Definition: Presence or type of auxiliary lane Attributes:
Source of Coding: Project Team 36. AUXILIARY LANE LENGTH Definition: Attributes:
Source of Coding: Project Team 37. HOV LANES Definition: Presence of HOV lanes in segment Attributes:
Source of Coding: Project Team 38. HOV LANE TYPES Definition: HOV lane types Attributes:
Source of Coding: HPMS 39. REVERSIBLE LANES Definition: Number of reversible lanes present on segment Attributes:
Source of Coding: Project Team 40. PRESENCE/TYPE OF BICYCLE FACILITY Definition: Presence or type of bicycle facility on segment Attributes:
Source of Coding: Project Team, SafetyAnalyst 41. WIDTH OF MARKED BICYCLE LANE OR BIKE PATH Definition: Width of marked bicycle lane or bike path Attributes:
Source of Coding: Project Team 42. WIDTH OF WIDE CURB LANE Definition: Width of wide curb lane used by both vehicles and bicycles Attributes:
Source of Coding: Project Team 43. NUMBER OF PEAK HOUR LANES Definition: Number of through lanes used in peak period in the peak direction, Include HOV lanes, reversible lanes, parking lanes, or shoulders that legally are used for through traffic during the peak period in the peak direction. Attributes:
Source of Coding: HPMS I.C.3. SHOULDER DESCRIPTORS 44. RIGHT SHOULDER TYPE Definition: Shoulder type on right side of road in direction of inventory Attributes:
Source of Coding: SafetyAnalyst 45. RIGHT SHOULDER TOTAL WIDTH Definition: Total width of right shoulder including paved and unpaved parts Attributes:
Source of Coding: All sources 46. RIGHT PAVED SHOULDER WIDTH Definition: Width of paved portion of right shoulder Attributes:
Source of Coding: All sources 47. LEFT SHOULDER TYPE Definition: Shoulder type on left side of roadway in direction of inventory. For undivided roads and divided roads with one direction of inventory, this will be the outside shoulder on the opposing side. Note that information on paved width of the inner (left) shoulder is included under median descriptors. Attributes:
Source of Coding: SafetyAnalyst 48. LEFT SHOULDER TOTAL WIDTH Definition: Width of left (outside) shoulder, including paved and unpaved parts. See definition of "Left Shoudler Type" above. Attributes:
Source of Coding: All sources 49. LEFT PAVED SHOULDER WIDTH Definition: Width of paved portion of left shoulder. See definition of "Left Shoudler Type" above. Attributes:
Source of Coding: All sources 50. SHOULDER RUMBLE STRIP PRESENCE Definition: Presence of shoulder rumble strip Attributes:
Source of Coding: Project Team 51. RUMBLE STRIP TYPE Definition: Rumble strip type if present Attributes:
Source of Coding: Project Team 52. SIDEWALK PRESENCE Definition: Presence of sidewalk in direction of inventory Attributes:
Source of Coding: Project Team 53. CURB PRESENCE Definition: Presence of curb Attributes:
Source of Coding: TSIMS 54. CURB TYPE Definition: Curb type Attributes:
Source of Coding: Project Team I.C.4. MEDIAN DESCRIPTORS 55. MEDIAN TYPE Definition: Median type Attributes:
Source of Coding: Project Team 56. MEDIAN WIDTH Definition: Median width, including inside shoulders Attributes:
Source of Coding: HPMS 57. MEDIAN BARRIER TYPE Definition: Median barrier type Attributes:
Source of Coding: Based on SafetyAnalyst 58. MEDIAN (INNER) PAVED SHOULDER WIDTH Definition: The width of the paved shoulder on the median (inner) side of the roadway on a divided roadway. Note that information on type, width and paved width of nonmedian shoulders is included in the Shoulder Descriptors. See definition of Left Shoulder Type. Attributes:
Source of Coding: All sources 59. MEDIAN SHOULDER RUMBLE STRIP PRESENCE Definition: Presence of median shoulder rumble strip Attributes:
Source of Coding: Project Team 60. MEDIAN RUMBLE STRIP TYPE Definition: Rumble strip type if present Attributes:
Source of Coding: Project Team 61. MEDIAN LEFT TURN LANE TYPE Definition: Supplemental information on type of left turn lane in median. Note that basic information on number of median left turn lanes and the median turn-lane length should be captured under "Exclusive Left Turn Lane Presence" and "Exclusive Left Turn Lane Length" in the Lane Descriptors Attributes:
Source of Coding: Project Team 62. LEFT TURN LANE WIDTH Definition: Width of median left turn lane Attributes:
Source of Coding: All sources I.D. SEGMENT ROADSIDE DESCRIPTORS 63. ROADSIDE CLEARZONE WIDTH Definition: Roadside clearzone width Attributes:
Source of Coding: Project Team 64. SIDESLOPE Definition: Sideslope Attributes:
Source of Coding: IHSDM 65. ROADSIDE RATING Definition: A rating of the safety of the roadside from Appendix D, Publication No. FHWA-RD-99-207, Prediction of the Expected Safety Performance of Rural Two-Lane Highways. Collect only if clearzone width and sideslope are not collected. Attributes:
Source of Coding: IHSDM 66. DRIVEWAY INFORMATION Definition: Driveway count by type Attributes:
Source of Coding: Based on SafetyAnalyst, IHSDM 67. ROADSIDE HARDWARE DESCRIPTORS Definition: Roadside hardware descriptors (including type, location, size, distance from lane edge). Examples include barrier (type and terminal type), signs (size, breakaway?), culverts, etc. Attributes:
Source of Coding: To be defined on the basis of Asset Management Systems I.E. OTHER SEGMENT DESCRIPTORS 68. TERRAIN TYPE (E.G., MOUNTAINOUS, LEVEL) Definition: Basic terrain type around segment. This is a (poor) surrogate for detailed data on curvature and grade, and would be collected only in the absence of those variables. See Alighnment variables below. Attributes:
Source of Coding: All sources 69. BRIDGE DESCRIPTORS FOR BRIDGES IN SEGMENT Definition: Bridge descriptors for bridges in segment Attributes:
Source of Coding: National Bridge Index 70. RR GRADE CROSSING DESCRIPTORS FOR CROSSINGS IN SEGMENT Definition: RR grade crossing descriptors for crossings in segment Attributes:
Source of Coding: USDOT National Highway-Rail Crossing Inventory 71. NUMBER OF SIGNALIZED INTERSECTIONS IN SECTION Definition: Number of signalized intersections in section Attributes:
Source of Coding: HPMS 72. NUMBER OF STOP-CONTROLLED INTERSECTIONS IN SECTION Definition: Number of stop-controlled intersections in section Attributes:
Source of Coding: HPMS 73. NUMBER OF UNCONTROLLED/OTHER INTERSECTIONS Definition: Number of uncontrolled/other intersections Attributes:
Source of Coding: HPMS I.F. SEGMENT TRAFFIC FLOW DATA 74. AVERAGE DAILY TRAFFIC VOLUME Definition: AADT Attributes:
Source of Coding: All sources 75. AADT YEAR Definition: Year of AADT Attributes:
Source of Coding: All sources 76. AADT ANNUAL ESCALATION PERCENTAGE Definition: Expected annual percent growth in AADT, with "AADT YEAR" as base year. This will allow calculation of current year’s AADT if "AADT YEAR" differs from current year. Attributes:
Source of Coding: IHSDM 77. PERCENTAGE TRUCK OR TRUCK AADT Definition: Percentage truck or truck AADT (includes tractor-semis and trucks with 6+ wheels) Attributes:
Source of Coding: SafetyAnalyst 78. TOTAL DAILY TWO-WAY PEDESTRIAN COUNT/EXPOSURE Definition: Total daily pedestrian flow in both directions (unless directional segment). This is a(poor) surrogate for crossing pedestrian counts. Attributes:
Source of Coding: Project Team 79. BICYCLE COUNT/EXPOSURE Definition: Total daily bicycle flow in both directions (unless directional segment) Attributes:
Source of Coding: Project Team 80. MOTORCYCLE COUNT OR PERCENTAGE Definition: Motorcycle daily count or percentage of AADT Attributes:
Source of Coding: Project Team 81. HOURLY TRAFFIC VOLUMES (OR PEAK AND OFFPEAK AADT) Definition: Hourly traffic volumes (or peak and offpeak AADT) Attributes:
Source of Coding: SafetyAnalyst 82. K-FACTOR Definition: The K-factor is the 30th highest hourly volume (i.e., the design hour volume) for a year, as a percentage of the annual average daily traffic. Attributes:
Source of Coding: HPMS 83. FUTURE AADT Definition: Forecasted AADT Attributes:
Source of Coding: HPMS 84. FUTURE AADT YEAR Definition: Year of forecasted AADT Attributes:
Source of Coding: HPMS 85. DIRECTIONAL FACTOR Definition: Proportion of peak hour traffic in the predominate direction of flow Attributes:
Source of Coding: HPMS 86. PERCENT COMBINATION TRUCKS - DAILY AVERAGE Definition: Percent combination trucks - daily average Attributes:
Source of Coding: All sources 87. PERCENT SINGLE UNIT TRUCKS - DAILY AVERAGE Definition: Percent single unit trucks - daily average Attributes:
Source of Coding: All sources I.G. SEGMENT TRAFFIC OPERATIONS/CONTROL DATA 88. ONE/TWO-WAY OPERATIONS Definition: Whether the segment operates as a one- or two-way roadway Attributes:
Source of Coding: SafetyAnalyst 89. SPEED LIMIT Definition: Speed limit Attributes:
Source of Coding: All sources 90. SCHOOL ZONE INDICATOR Definition: Whether segment contains a school zone Attributes:
Source of Coding: Project Team 91. ON-STREET PARKING PRESENCE Definition: Time-based parking restrictions Attributes:
Source of Coding: SafetyAnalyst, TSIMS 92. ON-STREET PARKING TYPE Definition: On-street parking type Attributes:
Source of Coding: HPMS and Project Team 93. ROADWAY LIGHTING Definition: Type of roadway lighting Attributes:
Source of Coding: SafetyAnalyst 94. TRUCK ROUTE DESIGNATION Definition: Truck route designation Attributes:
Source of Coding: HPMS 95. TOLL FACILITY? Definition: Whether the segment is a toll facility Attributes:
Source of Coding: HPMS 96. EDGELINE PRESENCE/TYPE Definition: Edgeline presence/type Attributes:
Source of Coding: Project Team 97. CENTERLINE PRESENCE/TYPE Definition: Centerline presence/type Attributes:
Source of Coding: Project Team 98. NO PASSING ZONE CODE/PASSING PERMISSIBILITY Definition: No passing zone code/passing permissibility Attributes:
Source of Coding: HPMS 99. 85TH % SPEED Definition: Traffic speed exceeded by 15 percent of the vehicles in the flow Attributes:
Source of Coding: SafetyAnalyst II. ROADWAY ALIGNMENT DESCRIPTORS (Note that these variables are best captured in a separate file that is linkable to inventory, crash, and other files.) II.A. HORIZONTAL CURVE DATA (Each data record will define an angle point or a single curve, even if the curve is a component of a compound or reverse curve. Spirals or other transitions are part of the curve.) 100. CURVE IDENTIFIERS AND LINKAGE VARIABLES Definition: All variables needed to define location of each curve record and all variables necessary to link with other safety files. Attributes:
Source of Coding: All Sources 101. CURVE FEATURE TYPE Definition: Type of horizontal alignment feature being described in the data record Attributes:
Source of Coding: Project Team 102. HORIZONTAL CURVE DEGREE OR RADIUS Definition: Degree or radius of curve Attributes:
Source of Coding: All Sources 103. HORIZONTAL CURVE LENGTH Definition: Length of curve including spiral Attributes:
Source of Coding: All Sources 104. CURVE SUPERELEVATION OR SUPERELEVATION ADEQUACY Definition: Either measured superelevation rate or percent or adequacy of superelevation when compared to AASHTO design standards Attributes:
Source of Coding: Project Team 105. HORIZONTAL TRANSITION/SPIRAL CURVE PRESENCE Definition: Presence/type of transition from tangent to curve and curve to tangent Attributes:
Source of Coding: Project Team 106. HORIZONTAL CURVE INTERSECTION/DEFLECTION ANGLE Definition: The angle between the two intersecting tangents in the direction of inventory(sometimes called the "deflection angle"). Attributes:
Source of Coding: IHSDM 107. HORIZONTAL CURVE DIRECTION Definition: Direction of curve in direction of inventory Attributes:
Source of Coding: IHSDM II.B. VERTICAL GRADE DATA (Each data record will define an individual grade or the angle point or vertical curve linking two grades.) 108. GRADE IDENTIFIERS AND LINKAGE VARIABLES Definition: All variables needed to define location of each vertical feature and all variables necessary to link with other safety files. Attributes:
Source of Coding: All sources 109. VERTICAL ALIGNMENT FEATURE TYPE Definition: Type of vertical alignment feature being described in the data record Attributes:
Source of Coding: Project Team 110. PERCENT OF GRADIENT Definition: Percent of gradient Attributes:
Source of Coding: All sources 111. GRADE LENGTH Definition: Grade length Attributes:
Source of Coding: All sources 112. VERTICAL CURVE LENGTH Definition: Vertical curve length Attributes:
Source of Coding: All sources III. ROADWAY JUNCTION DESCRIPTORS III.A. AT-GRADE INTERSECTION/JUNCTIONS III.A.1. GENERAL DESCRIPTORS 113. UNIQUE INTERSECTION IDENIFIER Definition: A numeric unique indentifer for each intersection/junction Attributes:
Source of Coding: Project Team 114. TYPE OF INTERSECTION/JUNCTION Definition: Type of Junction being described in the data record Attributes:
Source of Coding: Project Team 115. LOCATION IDENTIFIER FOR ROAD 1 CROSSING POINT Definition: Location on the first intersecting route (e.g., route-milepost) Attributes:
Source of Coding: Project Team 116. LOCATION IDENTIFIER FOR ROAD 2 CROSSING POINT Definition: Location on the second intersecting route (e.g., route-milepost) Attributes:
Source of Coding: Project Team 117. LOCATION IDENTIFIER FOR ROAD 3, 4, ETC., CROSSING POINT (E.G.,ROUTE-MILEPOST), ETC. Definition: Location on the third and subsequent intersecting route (e.g., route-milepost) Attributes:
Source of Coding: Project Team 118. INTERSECTION/JUNCTION NO. OF LEGS Definition: Intersection/junction no. of legs Attributes:
Source of Coding: SafetyAnalyst 119. INTERSECTION/JUNCTION GEOMETRY Definition: Intersection/junction geometry Attributes:
Source of Coding: Project Team 120. SCHOOL ZONE INDICATOR Definition: Whether the intersection/junction is in a school zone Attributes:
Source of Coding: Project Team 121. RAILROAD CROSSING NUMBER Definition: Railroad crossing number if a RR grade crossing (for linkage to National Highway-Rail Crossing Inventory) Attributes:
Source of Coding: Project Team 122. INTERSECTION SKEW ANGLE Definition: Angle from perpendicular of intersection of the roads Attributes:
Source of Coding: SafetyAnalyst 123. INTERSECTION/JUNCTION OFFSET Definition: Whether crossroad approach centerlines are directly opposed or offset by some Attributes:
Source of Coding: SafetyAnalyst 124. INTERSECTION/JUNCTION OFFSET DISTANCE Definition: Distance that approach centerlines are offset Attributes:
Source of Coding: SafetyAnalyst 125. INTERSECTION/JUNCTION TRAFFIC CONTROL Definition: Traffic control present at intersection/junction Attributes:
Source of Coding: Project Team 126. SIGNALIZATION TYPE (E.G., ACTUATED, FIXED, SYSTEM) Definition: Type of signalization at intersection/junction Attributes:
Source of Coding: SafetyAnalyst and Project Team 127. NUMBER OF INTERSECTION/JUNCTION QUADRANTS WITH LIMITED SIGHT DISTANCE Definition: Number of intersection/junction quadrants with limited sight distance Attributes:
Source of Coding: IHSDM 128. INTERSECTION/JUNCTION LIGHTING Definition: Type of lighting at intersection/junction Attributes:
Source of Coding: Project Team 129. ROUNDABOUT - NO. OF CIRCULATORY LANES Definition: No. of circulatory lanes in roundabout Attributes:
Source of Coding: Project Team 130. ROUNDABOUT—CIRCULATORY WIDTH Definition: Width of the roadway between the central island and outer edge of the circulatory lane Attributes:
Source of Coding: Project Team 131. ROUNDABOUT - INSCRIBED DIAMETER Definition: Distance between the outer edges of the circulatory roadway Attributes:
Source of Coding: Project Team 132. ROUNDABOUT—BICYCLE FACILITY Definition: Type of bicycle facililty at roundabout Attributes:
Source of Coding: Project Team III.A.2. AT-GRADE INTERSECTION/JUNCTION DESCRIPTORS (EACH APPROACH) 133. APPROACH AADT Definition: AADT on approach described Attributes:
Source of Coding: All sources 134. APPROACH USE TYPE Definition: Usage of approach Attributes:
Source of Coding: Project Team 135. APPROACH IS TWO-WAY, ONE-WAY Definition: One-way or two-way flow on approach Attributes:
Source of Coding: All sources 136. NO. OF THRU LANES Definition: Total number of thru lanes on approach, both directions Attributes:
Source of Coding: All sources 137. NO. OF EXCLUSIVE LEFT TURN LANES Definition: Number of exclusive left turn lanes on approach Attributes:
Source of Coding: All sources 138. NO. OF EXCLUSIVE RIGHT TURN LANES Definition: Number of exclusive right turn lanes on approach Attributes:
Source of Coding: All sources 139. LENGTH OF EXCLUSIVE LEFT TURN LANES Definition: Length of exclusive left turn lanes Attributes:
Source of Coding: Project Team 140. LENGTH OF EXCLUSIVE RIGHT TURN LANES Definition: Length of exclusive right turn lanes Attributes:
Source of Coding: Project Team 141. MEDIAN TYPE AT INTERSECTION Definition: Median type at intersection on approach Attributes:
Source of Coding: Project Team 142. APPROACH TRAFFIC CONTROL Definition: Traffic control present on approach Attributes:
Source of Coding: Project Team 143. LEFT-TURN PROTECTION Definition: Presence and time of left turn protection Attributes:
Source of Coding: Project Team 144. SIGNAL PROGRESSION Definition: Signal progression on approach Attributes:
Source of Coding: SafetyAnalyst and Project Team 145. CROSSWALK PRESENCE/TYPE Definition: Type of crosswalk Attributes:
Source of Coding: Project Team 146. PEDESTRIAN SIGNALIZATION TYPE Definition: Type of pedestrian signalizaton on approach Attributes:
Source of Coding: Project Team 147. PEDESTRIAN SIGNAL SPECIAL FEATURES Definition: Special features for either pushbutton or recall pedestrian signals Attributes:
Source of Coding: Project Team 148. CROSSING PEDESTRIAN COUNT/EXPOSURE Definition: Count or estimate of average daily pedestrian flow crossing this approach (Note: only applicable to approaches with vehicular traffic.) Attributes:
Source of Coding: Project Team and SafetyAnalyst 149. LEFT/RIGHT TURN PROHIBITIONS Definition: Left- or right turn prohibitions on this approach Attributes:
Source of Coding: Based on SafetyAnalyst 150. LEFT TURN COUNTS/PERCENT Definition: Count or estimate of average daily left turns, or percent of total approach traffic turning left. (Note: This could also be captured for peak-periods only or by hour of day.) Attributes:
Source of Coding: Project Team 151. RIGHT TURN COUNTS/PERCENT Definition: Count or estimate of average daily righ-turns, or percent of total approach traffic turning right. (Note: This could also be captured for peak-periods only or by hour of day.) Attributes:
Source of Coding: Project Team 152. TRANSVERSE RUMBLE STRIP PRESENCE Definition: Presence of transverse rumble strip on approach Attributes:
Source of Coding: Project Team 153. ROUNDABOUT—ENTRY WIDTH Definition: Full width of entry where it meets the inscribed circle. Note that total width of the approach can be derived from totaling entry width, exit width and splitter island width. Attributes:
Source of Coding: Project Team 154. ROUNDABOUT—NUMBER OF ENTRY LANES Definition: Number of entry lanes into roundabout on this approach Attributes:
Source of Coding: Project Team 155. ROUNDABOUT—ENTRY RADIUS Definition: Minimum radius of curvature of the curb on the right side of the entry. Attributes:
Source of Coding: Project Team 156. ROUNDABOUT—EXIT WIDTH Definition: Full width of exit where it meets the inscribed circle. Note that total width of the approach can be derived from totaling entry width, exit width and splitter island width. Attributes:
Source of Coding: Project Team 157. ROUNDABOUT—NUMBER OF EXIT LANES Definition: Number of exit lanes from roundabout on this approach leg. Attributes:
Source of Coding: Project Team 158. ROUNDABOUT—EXIT RADIUS Definition: Minimum radius of curvature of the curb on the right side of the exit. Attributes:
Source of Coding: Project Team 159. ROUNDABOUT—PEDESTRIAN FACILITY Definition: Type of pedestrian crossing facility on this approach to roundabout Attributes:
Source of Coding: Project Team 160. ROUNDABOUT—CROSSWALK LOCATION (DISTANCE FROM YIELD LINE) Definition: Location of marked pedestrian crosswalk relative to yield line Attributes:
Source of Coding: Project Team 161. ROUNDABOUT—SPLITTER ISLAND WIDTH Definition: Width of the splitter island separating entry and exit legs (measured at the inscribed circle). Attributes:
Source of Coding: Project Team III.B. INTERCHANGE AND RAMP DESCRIPTORS III.B.1. GENERAL INTERCHANGE DESCRIPTORS 162. UNIQUE INTERCHANGE IDENIFIER Definition: A numeric unique indentifer for each interchange Attributes:
Source of Coding: Project Team 163. LOCATION IDENTIFIER FOR ROAD 1 CROSSING POINT Definition: Location on the first intersecting route (e.g., route-milepost) Attributes:
Source of Coding: Project Team 164. LOCATION IDENTIFIER FOR ROAD 2 CROSSING POINT Definition: Location on the second intersecting route (e.g., route-milepost) Attributes:
Source of Coding: Project Team 165. LOCATION IDENTIFIER FOR ROAD 3, 4, ETC., CROSSING POINT Definition: Location on the third and subsequent intersecting route (e.g., route-milepost) Attributes:
Source of Coding: Project Team 166. INTERCHANGE TYPE (DIAMOND, CLOVER, ETC.) Definition: Type of interchange Attributes:
Source of Coding: Project Team 167. INTERCHANGE LIGHTING Definition: Type of interchange lighting Attributes:
Source of Coding: Project Team III.B.2. INTERCHANGE RAMP DESCRIPTORS (NOTE that each ramp in an interchange is described by the following variables. Thus, each ramp record includes a full description of an individual ramp. If a ramp splits into two ramps, a new record is generated for the second and all subsequent ramps.) 168. UNIQUE RAMP IDENTIFIER Definition: An identifier for each ramp that is part of a given interchange. This defines which ramp the following variables are describing. Attributes:
Source of Coding: Project Team 169. RAMP LENGTH Definition: Length of ramp Attributes:
Source of Coding: SafetyAnalyst 170. RAMP NO. OF LANES Definition: Number of lanes on ramp Attributes:
Source of Coding: SafetyAnalyst 171. RAMP AADT Definition: AADT on ramp Attributes:
Source of Coding: All source 172. RAMP POSTED SPEED LIMIT Definition: The posted (not advisory) speed limit on the ramp Attributes:
Source of Coding: Project Team 173. FEATURE AT BEGINNING RAMP TERMINAL Definition: A ramp is described by a beginning and ending ramp terminal in the direction of inventory. This variable describes the type of feature intersecting with the ramp at the beginning terminal. Attributes:
Source of Coding: Project Team 174. RAMP DESCRIPTOR AT BEGINNING RAMP TERMINAL Definition: Description of the beginning terminal of the ramp Attributes:
Source of Coding: Project Team 175. LOCATION IDENTIFIER FOR ROADWAY AT BEGINNING RAMP TERMINAL Definition: Location on the roadway at the beginning ramp terminal (e.g., route-milepost for that roadway) if the ramp connects with a roadway at that point. Attributes:
Source of Coding: Project Team 176. ROADWAY TRAFFIC FLOW DIRECTION AT BEGINNING RAMP TERMINAL Definition: Ramps can intersect a roadway on either of two sides. This defines the side of the road intersected by the ramp. Attributes:
Source of Coding: Project Team 177. FEATURE AT ENDING RAMP TERMINAL Definition: A ramp is described by a beginning and ending ramp terminal in the direction of inventory. This variable describes the type of feature intersecting with the ramp at the ending terminal. Attributes:
Source of Coding: Project Team 178. RAMP DESCRIPTOR AT ENDING RAMP TERMINAL Definition: Description of the ending terminal of the ramp Attributes:
Source of Coding: Project Team 179. LOCATION IDENTIFIER FOR ROADWAY AT ENDING RAMP TERMINAL Definition: Location on the roadway at the beginning ramp terminal (e.g., route-milepost for that roadway) if the ramp connects with a roadway at that point. Attributes:
Source of Coding: Project Team 180. ROADWAY TRAFFIC FLOW DIRECTION AT ENDING RAMP TERMINAL Definition: Ramps can intersect a roadway on either of two sides. This defines the side of the road intersected by the ramp. Attributes:
Source of Coding: Project Team |
