GB2179385A - Road studs - Google Patents

Road studs Download PDF

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Publication number
GB2179385A
GB2179385A GB08619851A GB8619851A GB2179385A GB 2179385 A GB2179385 A GB 2179385A GB 08619851 A GB08619851 A GB 08619851A GB 8619851 A GB8619851 A GB 8619851A GB 2179385 A GB2179385 A GB 2179385A
Authority
GB
United Kingdom
Prior art keywords
road
stud
pocket
studs
road surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08619851A
Other versions
GB2179385B (en
GB8619851D0 (en
Inventor
David John Swanwick
Trevor John Vickers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB8619851D0 publication Critical patent/GB8619851D0/en
Publication of GB2179385A publication Critical patent/GB2179385A/en
Application granted granted Critical
Publication of GB2179385B publication Critical patent/GB2179385B/en
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/02—Detecting movement of traffic to be counted or controlled using treadles built into the road
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/09—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges
    • E01C23/0993—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for forming or installing surface markings or signals in the paving, e.g. grooving for striping or for producing rumble strips, forming marker-receiving recesses
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
    • E01F9/506—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users characterised by the road surface marking material, e.g. comprising additives for improving friction or reflectivity; Methods of forming, installing or applying markings in, on or to road surfaces
    • E01F9/518—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users characterised by the road surface marking material, e.g. comprising additives for improving friction or reflectivity; Methods of forming, installing or applying markings in, on or to road surfaces formed in situ, e.g. by painting, by casting into the road surface or by deforming the road surface
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
    • E01F9/553—Low discrete bodies, e.g. marking blocks, studs or flexible vehicle-striking members

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Road Signs Or Road Markings (AREA)

Abstract

A road stud (18) is formed in situ from a settable plastics material solidified in a pocket in a road surface. The pocket is initially formed in the road surface by drilling an annulus and breaking away material within the annulus. The pocket is then filled with a thermoplastic material in molten form, which is then allowed to set.

Description

SPECIFICATION Road studs This invention relates to road studs, which are used, for example, for delineating crossing areas and no parking areas in the region of road crossings. These are usually referred to as "crossing studs" and "approach studs".
Such studs are provided at spaced intervals in a road surface, the size, spacing and location being determined by statute. It is known for each stud to comprise a metal or plastics plate with a spike which can be hammered or screwed into a road surface. These studs are expensive to manufacture and may be slippery, especially in wet weather, so that they are hazardous to cyclists. It is also known to adhere plates to a road surface or to paint markings on the surface. Known studs are liable to lift or become dislodged and painted markings wear away rapidly.
The present invention overcomes these problems.
In accordance with this invention there is provided a road stud formed in situ from a settable plastics material solidified in a pocket in a road surface.
The invention also resides in a method of manufacturing a road stud comprising forming a pocket in the road surface and filling the pocket with a settable plastics material to form the stud. The depth of the pocket at its maximum depth is preferably at least 3 mm and advantageously at least 5 mm.
The term "road" as used in this specification is intended to include hard surfaces other than roads for motor vehicles, e.g. runways or vehicle parking areas.
The invention permits the studs to be cheaply manufacturable of material which is not slippery for cyclists, or liable to be dislodged so that the correct positioning of the studs is retained as required by statute without need for recurring maintenance. The studs have the further advantage that they wear as the road wears.
Preferably, the settable material includes a light-reflective filler. This permits the studs to be clearly visible in vehicle headlights.
The settable material may be a thermoplastic material containing a white filler and preferably also containing glass particles.
Reference is now made to the accompanying drawings, wherein: Figure 1 is an elevational view of drilling equipment; Figure 2 is a sectional view of part of a road showing formations drilled by the equipment of Fig. 1; Figure 3 is a sectional view showing a pocket formed in a road surface; Figure 4 is a sectional view showing a road stud according to the invention in the road surface; and Figure 5 is a perspective view showing studs according to the invention in the road surface.
Initially a pocket is formed in a road surface by a drilling technique. A drill 11 is used comprising a central pilot bit 12 surrounded by an annular bit 13. The pilot bit permits drilling of an annulus by the annular bit in a precise location by guiding the annular bit. The annulus has an outer diameter of approximately 10 cm and a depth of approximately 1 to 2 cm. An annular recess 15 is formed in a road surface 14 and a pocket 16 is then formed by breaking away the road surface portion within the annulus. The bottom of the pocket is left with a jagged base 17 (Fig. 3).
The pocket 16 is filled with a heated fluid thermoplastic material to the uppermost edge of the pocket and the material is allowed to cool and set to form a stud 18 (Fig. 4). The jagged base 17 of the pocket keys the stud in the pocket. The stud projects slightly above the top of the pocket, the amount of the projection being determined by the surface tension of the fluid material during forming of the stud.
The material is a plastics resin with a white filler and with a filler of reflective glass particles. The material may be the same as that used for providing white markings on road surfaces and, for example, may be a hot-applied thermoplastic material reflectorised to a luminous factor 70 according to British Standard 3262.
The stud may incorporate a detection member, moulded in the stud. This permits detection of the stud so that it can serve as a measurement point near a road junction.
The detection member may be a deformabie metal member, e.g. of Z-section, which can be placed in the excavated pocket and deformed to the correct height before the plastics material is poured into the pocket.
1. A road stud formed in situ from a settable plastics material soiidified in a pocket in a road surface.
2. A road stud according to Claim 1, wherein the plastics material incorporates a light-reflective filler.
3. A road stud according to Claim 2, wherein the light-reflective filler includes glass particles.
4. A road stud according to Claim 2 or 3, wherein the light-reflective filler includes a white filler.
5. A road stud according to any preceding claim, wherein the maximum depth of the stud is at least 3 mm.
6. A road stud according to Claim 5, wherein said maximum depth is at least 5 mm.
7. A road stud according to any preceding claim including a detection member embedded
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (12)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Road studs This invention relates to road studs, which are used, for example, for delineating crossing areas and no parking areas in the region of road crossings. These are usually referred to as "crossing studs" and "approach studs". Such studs are provided at spaced intervals in a road surface, the size, spacing and location being determined by statute. It is known for each stud to comprise a metal or plastics plate with a spike which can be hammered or screwed into a road surface. These studs are expensive to manufacture and may be slippery, especially in wet weather, so that they are hazardous to cyclists. It is also known to adhere plates to a road surface or to paint markings on the surface. Known studs are liable to lift or become dislodged and painted markings wear away rapidly. The present invention overcomes these problems. In accordance with this invention there is provided a road stud formed in situ from a settable plastics material solidified in a pocket in a road surface. The invention also resides in a method of manufacturing a road stud comprising forming a pocket in the road surface and filling the pocket with a settable plastics material to form the stud. The depth of the pocket at its maximum depth is preferably at least 3 mm and advantageously at least 5 mm. The term "road" as used in this specification is intended to include hard surfaces other than roads for motor vehicles, e.g. runways or vehicle parking areas. The invention permits the studs to be cheaply manufacturable of material which is not slippery for cyclists, or liable to be dislodged so that the correct positioning of the studs is retained as required by statute without need for recurring maintenance. The studs have the further advantage that they wear as the road wears. Preferably, the settable material includes a light-reflective filler. This permits the studs to be clearly visible in vehicle headlights. The settable material may be a thermoplastic material containing a white filler and preferably also containing glass particles. Reference is now made to the accompanying drawings, wherein: Figure 1 is an elevational view of drilling equipment; Figure 2 is a sectional view of part of a road showing formations drilled by the equipment of Fig. 1; Figure 3 is a sectional view showing a pocket formed in a road surface; Figure 4 is a sectional view showing a road stud according to the invention in the road surface; and Figure 5 is a perspective view showing studs according to the invention in the road surface. Initially a pocket is formed in a road surface by a drilling technique. A drill 11 is used comprising a central pilot bit 12 surrounded by an annular bit 13. The pilot bit permits drilling of an annulus by the annular bit in a precise location by guiding the annular bit. The annulus has an outer diameter of approximately 10 cm and a depth of approximately 1 to 2 cm. An annular recess 15 is formed in a road surface 14 and a pocket 16 is then formed by breaking away the road surface portion within the annulus. The bottom of the pocket is left with a jagged base 17 (Fig. 3). The pocket 16 is filled with a heated fluid thermoplastic material to the uppermost edge of the pocket and the material is allowed to cool and set to form a stud 18 (Fig. 4). The jagged base 17 of the pocket keys the stud in the pocket. The stud projects slightly above the top of the pocket, the amount of the projection being determined by the surface tension of the fluid material during forming of the stud. The material is a plastics resin with a white filler and with a filler of reflective glass particles. The material may be the same as that used for providing white markings on road surfaces and, for example, may be a hot-applied thermoplastic material reflectorised to a luminous factor 70 according to British Standard 3262. The stud may incorporate a detection member, moulded in the stud. This permits detection of the stud so that it can serve as a measurement point near a road junction. The detection member may be a deformabie metal member, e.g. of Z-section, which can be placed in the excavated pocket and deformed to the correct height before the plastics material is poured into the pocket. CLAIMS
1. A road stud formed in situ from a settable plastics material soiidified in a pocket in a road surface.
2. A road stud according to Claim 1, wherein the plastics material incorporates a light-reflective filler.
3. A road stud according to Claim 2, wherein the light-reflective filler includes glass particles.
4. A road stud according to Claim 2 or 3, wherein the light-reflective filler includes a white filler.
5. A road stud according to any preceding claim, wherein the maximum depth of the stud is at least 3 mm.
6. A road stud according to Claim 5, wherein said maximum depth is at least 5 mm.
7. A road stud according to any preceding claim including a detection member embedded in the thermoplastic material.
8. A road stud according to Claim 7, wherein the detection memer comprises a Zsection, deformable metal member.
9. A road stud substantially as herein described with reference to the accompanying drawings.
10. A method of manufacturing a road stud comprising forming a pocket in a road surface and filling the pocket with a settable plastics material to form the stud.
11. A method according to Claim 10, comprising excavating an annulus and breaking away material within the annulus to form the pocket.
12. A method according to Claim 10, substantially as herein described with reference to the accompanying drawings.
GB08619851A 1985-08-17 1986-08-14 Road studs Expired GB2179385B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB858520644A GB8520644D0 (en) 1985-08-17 1985-08-17 Road studs

Publications (3)

Publication Number Publication Date
GB8619851D0 GB8619851D0 (en) 1986-09-24
GB2179385A true GB2179385A (en) 1987-03-04
GB2179385B GB2179385B (en) 1988-09-14

Family

ID=10583928

Family Applications (2)

Application Number Title Priority Date Filing Date
GB858520644A Pending GB8520644D0 (en) 1985-08-17 1985-08-17 Road studs
GB08619851A Expired GB2179385B (en) 1985-08-17 1986-08-14 Road studs

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB858520644A Pending GB8520644D0 (en) 1985-08-17 1985-08-17 Road studs

Country Status (1)

Country Link
GB (2) GB8520644D0 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0045180A1 (en) * 1980-07-30 1982-02-03 Redland Prismo Limited Apparatus for applying road marking materials to roadways

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0045180A1 (en) * 1980-07-30 1982-02-03 Redland Prismo Limited Apparatus for applying road marking materials to roadways

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
}HOT DOT THERMOPLASTIC MARKER} BROCHURE BY REDLAND PRISMO LTD ROWFANT CRAWLEY WEST SUSSEX RH10 4NF *

Also Published As

Publication number Publication date
GB2179385B (en) 1988-09-14
GB8619851D0 (en) 1986-09-24
GB8520644D0 (en) 1985-09-25

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 20060813