Marlborough District Council Roading Assets - Activity Management Plan 2015 - 2018 SECTION 1 EXECUTIVE SUMMARY The specified roughness levels by road group are in accordance with NZTA guidelines as per the table below. Measure Explanation Target Roughness Value by Road Group Group Urban Rural Maximum average roughness on R2 100 90 sealed roads Average NAASRA roughness of R3 110 100 all sealed roads in a group R4 120 110 R5 140 120 R6 140 140 Group Urban Rural No more than 5% by length in any R2 130 110 Maximum roughness on sealed group shall exceed the roughness R3 140 120 roads limits R4 150 130 R5 170 150 R6 170 180 NZTA Roughness Guidelines (may change with One Network Classification) Table 6.1.3.1b 1.6.1.3.2 Smooth Travel Exposure (STE) Smooth travel exposure is the proportion of travel undertaken on smooth roads. This measure takes into account the fact that the standard of ride and maintenance intervention levels are dependent on road usage and that a rougher surface is acceptable for lower volume roads. Smooth travel exposure is expressed as a percentage and calculated as follows: STE = Vehicle Km Travelled (VKT) < specified roughness x 100 Total VKT The definitions used to define smooth roads for each road use category are outlined in Table 6.1.3.2a below. Traffic Volume Smooth Level Classification Hierarchy Description (AADT) (NAASRA counts per km) Rural Primary Arterials R2 < 110 Rural Rural Secondary Arterials R3 <120 Rural Collector and Local Rds R4 – R6 <130 Urban All R2 – R6 < 150 Smooth Travel Definition (may change with One Network Classification) Table 6.1.3.2a The level of smooth travel exposure on the network is summarised in Table 6.1.3.2b below. Traffic Smooth Smooth Classification Volume Travel Travel Travel Travel (million (million (AADT) VKT) (%) VKT) (%) Rural < 1000 49.86 38% 47.60 95% >= 1000 11.90 9% 11.90 100% Urban < 500 6.85 5% 6.47 94% 500 - 3999 33.66 26% 32.48 97% 4000 - 9999 25.83 20% 22.81 88% >= 10,000 2.07 2% 1.28 62% Totals 130.16 100% 122.53 94% Smooth Travel Exposure Table 6.1.3.2b 30 September 2014 Page 33 of Section 1