In November 2024, the Executive Engineer’s Office of the Road Development Authority (RDA) – Southern Province, Matara Division, issued tenders to refurbish road markings across multiple local roads in Matara District. The program targets urban spines, school approaches, market corridors, and village connectors that had suffered visibility loss due to fading lines and seasonal wear. The works were split into two contract packages—white markings and yellow markings—covering centerlines, edge lines, and pedestrian crossings.
Because the tender explicitly stated that “marking materials are not supplied by RDA,” contractors were required to procure compliant thermoplastic materials themselves. After technical evaluation and field sampling, the contractor selected BOLE as the thermoplastic paint supplier for this program, based on proven performance, documentation completeness, and support readiness.
The specification called for hot-applied thermoplastic road marking paint at a nominal 3 mm build, with high-refractive-index glass beads both intermixed and surface-broadcast (“drop-on”) to achieve the required retroreflectivity. White and yellow colorimetry, daytime luminance, nighttime retroreflectivity, skid resistance, and durability benchmarks align with RDA practice for primary and secondary roads.
Matara’s coastal climate—high humidity, intense UV, and heavy rainfall—demands markings that bond firmly to asphalt and resist rapid wear. Thermoplastic forms a thick, dense layer that retains glass beads at the surface, preserving legibility and brightness through monsoon seasons and high traffic volumes.
The material and performance envelope mirrors international norms (e.g., AASHTO M249 for thermoplastic), ensuring consistent build, bead retention, and visibility. This alignment simplifies acceptance testing and long-term maintenance planning.
Yellow centerlines are used to separate opposing flows on two-way roads—continuous, dashed, or combinations depending on sight distance and overtaking policies. Standard longitudinal width is 100–150 mm, with curvature transitions and tapers defined at conflict points.
White edge lines provide continuous lateral guidance, particularly valuable during rain and low-light conditions. On narrow village connectors, edge lines also visually narrow the lane to calm speeds while improving driver lane discipline.
Zebra crossings (white thermoplastic) were prioritized at schools, clinics, bus stops, and market entrances. Stop bars, turn arrows, and “SLOW/SCHOOL” legends were included where warranted, using the same thermoplastic system to maintain uniform durability and reflectivity.
With materials not supplied by RDA, the prime contractor compared multiple sources and selected BOLE for thermoplastic road marking paint after reviewing performance data, bead compatibility, batch consistency, and delivery timelines. BOLE’s documentation set—technical data sheets, batch QC reports, and compliance statements—matched the tender’s verification needs.
BOLE supplied two high-reflectivity formulations—white and yellow—optimized for a 3 mm nominal build with robust bead anchoring. To support first-run quality, BOLE provided on-site start-up guidance covering kettle temperatures, line speed, screed height, and bead broadcast rates. Where substrates differed (old polished asphalt vs. newer overlays), BOLE advised on surface prep and pilot passes to lock in adhesion.
Field inspections showed bright, uniform lines with consistent bead embedment. Night retroreflectivity improved markedly on school approaches and rural curves, reducing driver uncertainty in wet conditions.
At 90-day follow-up, no early peeling or edge fraying was observed. Freight routes and bus corridors retained line definition despite braking and turning stresses, indicating strong substrate bonding and bead retention.
Drivers and residents reported clearer guidance at night and during monsoon rains. Local traffic officers noted fewer unsafe overtakes where centerline patterns were refreshed and clarified.
BOLE adjusts resin content, pigment package, and bead ratios to suit Sri Lanka’s hot, humid climate and mixed-traffic wear profiles, ensuring lines stay bright and intact through seasonal cycles.
With successful thermoplastic deployments across Southeast and South Asia, BOLE brings repeatable quality, batch-to-batch consistency, and practical start-up support to accelerate learning curves on new corridors.
Beyond paint, BOLE supports BOLE’s thermoplastic paint users with compatible equipment options, import logistics, and on-site commissioning guidance—streamlining execution for contractors and municipalities.
The Matara District thermoplastic program demonstrates how standard-driven materials and disciplined execution can elevate road safety quickly and cost‑effectively. By pairing a 3 mm thermoplastic system with calibrated glass bead application, project teams achieved durable, high‑visibility lines across urban and rural links. With BOLE supplying compliant materials and practical field support, the district now benefits from clearer guidance, better nighttime legibility, and reduced maintenance frequency—outcomes that will serve residents and road users for years to come.
