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Practice route
Challenging

Dumbarton · Route 4

Near Dumbarton test centre

56.8 km
Distance
35 min
Duration
Challenging
Difficulty
19
Manoeuvres
Difficulty: Challenging

Rated challenging from its real manoeuvre load, 4 roundabouts, 21 turns and 5 signalled junctions across 27 navigation steps.

How this route is examined

This is an independent 56.8 km practice route near Dumbarton test centre, taking roughly 35 min to drive. It is NOT an official DVSA examiner route, the DVSA does not publish those, but it uses the same local roads and junction types an examiner is likely to choose.

Along the way you'll meet Barloan Toll, Glasgow Road, Lomond Gate and Stirling Road. Knowing the approach, lane and exit at each one before you arrive is the difference between a planned manoeuvre and a last-second reaction, and last-second reactions are where avoidable faults come from.

On this route you’ll practise multiple roundabouts, dual-carriageway joins, national-speed roads, 20 mph zones, changing speed limits, residential manoeuvres, busy a-roads and sustained concentration. Driving it a few times before your test builds the muscle memory that frees up attention for observation and decision-making on the day.

The loop is anchored by 20 catalogued landmarks, including named junctions, stations, shops and churches, so you can navigate it from recognisable features rather than a memorised turn list. Rehearsing it in this way means that on test day the area already feels familiar, and your attention is free for the traffic rather than the map.

Whatever the route, your practical test follows the same national shape: an eyesight check, a couple of vehicle-safety questions, around forty minutes of general driving, one reversing manoeuvre chosen by the examiner, and roughly twenty minutes of independent driving following signs or a sat-nav. Practising on roads like these is how you make each of those elements feel routine rather than new.

Treat this route as practice, not a script. The value is not in repeating one fixed sequence but in getting comfortable with the road types, speed changes and junction patterns of the area around Dumbarton test centre, so that whatever order your examiner chooses on the day, none of it is unfamiliar. Drive it a few times, focus on smooth observation and planning, and it becomes one more stretch of road you already know, which is exactly the kind of preparation that turns nerves into confidence.

If you are practising with a supervising driver rather than an instructor, take it steadily: agree the manoeuvre spots in advance, keep to a comfortable pace, and stop to talk through anything that felt rushed. And remember the basics that apply on every road, mirrors before any change of speed or direction, signals in good time, and a following distance that gives you room to react. Those habits travel with you long after the test is passed.

Manoeuvre breakdown

What you’ll actually do on this loop, counted from its turn-by-turn directions.

14
Left turns
7
Right turns
4
Roundabouts
5
Traffic lights
27
Total steps

Skills & features

9
Roundabouts
8.7 km
Dual carriageway
20, 30, 40, 60, 70 mph
Speed limits
20
Landmarks

This route helps you practise:

  • Multiple roundabouts
  • Dual-carriageway joins
  • National-speed roads
  • 20 mph zones
  • Changing speed limits
  • Residential manoeuvres
  • Busy A-roads
  • Sustained concentration

Road mix

  • A-roads 23.2 km
  • B-roads 12.3 km
  • Trunk roads 8.7 km
  • Residential 6.1 km
  • Minor roads 3.6 km
  • service_other 1.3 km
  • Unclassified 1.1 km

Turn-by-turn directions

The full 199-step drive on real, named roads (about 58.0 km). An indicative practice loop, not an official DVSA route — the roads and junctions are real, the sequence is a rehearsal.

  1. Depart:

    Drive northeast.

    109 m

  2. Turn right:

    Turn right.

    32 m

  3. Turn left:

    Turn left.

    65 m

  4. Turn right:

    Turn right.

    416 m

  5. Keep right:

    Keep right at the fork.

    578 m

  6. Roundabout:

    Enter the roundabout and take the 2nd exit onto A813.

    42 m

  7. Leave roundabout:

    Exit the roundabout onto A813.

    A813279 m

  8. Keep left:

    Keep left to take Stirling Road/A813.

    Stirling Road129 m

  9. Keep left:

    Keep left to stay on Stirling Road/A813.

    Stirling Road253 m

  10. Roundabout:

    Enter the roundabout and take the 2nd exit onto Stirling Road/A813.

    35 m

  11. Leave roundabout:

    Exit the roundabout onto Stirling Road/A813.

    Stirling Road88 m

  12. Roundabout:

    Enter Lomond Gate and take the 1st exit onto A82/Stirling Road.

    Lomond Gate9 m

  13. Leave roundabout:

    Exit the roundabout onto A82/Stirling Road.

    A82583 m

  14. Roundabout:

    Enter Barloan Toll and take the 5th exit onto Townend Road/B830.

    Barloan Toll128 m

  15. Leave roundabout:

    Exit the roundabout onto Townend Road/B830. Continue on B830.

    B8301.2 km

  16. Roundabout:

    Enter Glasgow Road and take the 5th exit onto Church Street/B830.

    Glasgow Road186 m

  17. Leave roundabout:

    Exit the roundabout onto Church Street/B830.

    Church Street81 m

  18. Turn left:

    Turn left onto Station Road.

    Station Road498 m

  19. Turn left:

    Turn left onto Glasgow Road/A814.

    Glasgow Road396 m

  20. Roundabout:

    Enter the roundabout and take the 3rd exit onto Glasgow Road/A814.

    93 m

  21. Leave roundabout:

    Exit the roundabout onto Glasgow Road/A814.

    Glasgow Road342 m

  22. Roundabout:

    Enter the roundabout and take the 2nd exit onto Glasgow Road/A814.

    17 m

  23. Leave roundabout:

    Exit the roundabout onto Glasgow Road/A814.

    Glasgow Road647 m

  24. Turn right:

    Turn right onto Eastfield Crescent.

    Eastfield Crescent31 m

  25. Turn right:

    Turn right onto Burnside Place.

    Burnside Place81 m

  26. Turn left:

    Turn left to stay on Burnside Place.

    Burnside Place122 m

  27. Turn left:

    Turn left onto Eastfield Crescent.

    Eastfield Crescent68 m

  28. Turn left:

    Turn left onto Glasgow Road/A814.

    Glasgow Road644 m

  29. Roundabout:

    Enter the roundabout and take the 2nd exit onto Glasgow Road/A814.

    30 m

  30. Leave roundabout:

    Exit the roundabout onto Glasgow Road/A814.

    Glasgow Road353 m

  31. Roundabout:

    Enter the roundabout and take the 5th exit onto Strathleven Place.

    149 m

  32. Leave roundabout:

    Exit the roundabout onto Strathleven Place.

    Strathleven Place585 m

  33. Turn right:

    Turn right onto Round Riding Road.

    Round Riding Road574 m

  34. Turn left:

    Turn left onto Kilpatrick View.

    Kilpatrick View115 m

  35. Turn left:

    Turn left onto Gibson Street.

    Gibson Street100 m

  36. Keep right:

    Keep right to stay on Gibson Street.

    Gibson Street146 m

  37. Turn right:

    Turn right onto Colquhoun Street.

    Colquhoun Street90 m

  38. Keep left:

    Keep left to stay on Colquhoun Street.

    Colquhoun Street52 m

  39. Turn right:

    Turn right onto Doveholm Avenue.

    Doveholm Avenue68 m

  40. Turn right:

    Turn right onto Gibson Avenue.

    Gibson Avenue131 m

  41. Turn right:

    Turn right onto Gibson Street.

    Gibson Street78 m

  42. Turn left:

    Turn left onto Colquhoun Street.

    Colquhoun Street88 m

  43. Turn left:

    Turn left onto Round Riding Road.

    Round Riding Road417 m

  44. Turn left:

    Turn left onto A82/Stirling Road.

    A82512 m

  45. Roundabout:

    Enter Barloan Toll and take the 2nd exit onto A82/Stirling Road.

    Barloan Toll75 m

  46. Leave roundabout:

    Exit the roundabout onto A82/Stirling Road.

    A82562 m

  47. Roundabout:

    Enter Lomond Gate and take the 6th exit onto A82.

    Lomond Gate259 m

  48. Leave roundabout:

    Exit the roundabout onto A82.

    A82820 m

  49. Take exit:

    Take the exit.

    A82811 m

  50. Turn right:

    Turn right onto Renton Road/A812. Continue on Renton Road.

    Renton Road715 m

  51. Keep right:

    Keep right to take B857.

    B857971 m

  52. Turn right:

    Turn right onto Stirling Street.

    Stirling Street165 m

  53. Turn right:

    Turn right onto Burns Street.

    Burns Street259 m

  54. Turn left:

    Turn left onto Main Street/B857. Continue on B857.

    B857948 m

  55. Turn left:

    Turn left to take the A82 ramp.

    A821.6 km

  56. Roundabout:

    Enter Lomond Gate and take the 2nd exit onto A82/Stirling Road.

    Lomond Gate58 m

  57. Leave roundabout:

    Exit the roundabout onto A82/Stirling Road.

    A82584 m

  58. Roundabout:

    Enter Barloan Toll and take the 5th exit onto Townend Road/B830.

    Barloan Toll128 m

  59. Leave roundabout:

    Exit the roundabout onto Townend Road/B830.

    Townend Road51 m

  60. Turn left:

    Move left onto Bonhill Road.

    Bonhill Road38 m

  61. Keep right:

    Keep right to stay on Bonhill Road.

    Bonhill Road1.0 km

  62. Roundabout:

    Enter Glasgow Road and take the 4th exit.

    Glasgow Road1.3 km

  63. Roundabout:

    Enter Barloan Toll and take the 2nd exit onto A82/Stirling Road.

    Barloan Toll25 m

  64. Leave roundabout:

    Exit the roundabout onto A82/Stirling Road.

    A82562 m

  65. Roundabout:

    Enter Lomond Gate and take the 3rd exit onto Stirling Road/A813.

    Lomond Gate115 m

  66. Leave roundabout:

    Exit the roundabout onto Stirling Road/A813.

    Stirling Road87 m

  67. Roundabout:

    Enter the roundabout and take the 2nd exit onto Stirling Road/A813.

    35 m

  68. Leave roundabout:

    Exit the roundabout onto Stirling Road/A813.

    Stirling Road100 m

  69. Keep right:

    Keep right to stay on Stirling Road/A813.

    Stirling Road511 m

  70. Keep right:

    Keep right to stay on A813.

    A81343 m

  71. Roundabout:

    Enter the roundabout and take the 2nd exit onto A813.

    35 m

  72. Leave roundabout:

    Exit the roundabout onto A813.

    A81334 m

  73. Turn left:

    Move left onto Stirling Road/A813. Continue on Stirling Road.

    Stirling Road925 m

  74. Roundabout:

    Enter the roundabout and take the 1st exit onto Strathleven Drive.

    15 m

  75. Leave roundabout:

    Exit the roundabout onto Strathleven Drive.

    Strathleven Drive256 m

  76. Turn right:

    Turn right onto Strathleven Park.

    Strathleven Park102 m

  77. Roundabout:

    Enter the roundabout and take the 1st exit onto Stirling Road/A813.

    21 m

  78. Leave roundabout:

    Exit the roundabout onto Stirling Road/A813.

    Stirling Road1.3 km

  79. Turn left:

    Turn left onto Bridge Street.

    Bridge Street284 m

  80. Turn left:

    Move left onto B857.

    B85793 m

  81. Turn left:

    Move left to stay on B857.

    B85775 m

  82. Keep left:

    Keep left to stay on B857.

    B857103 m

  83. Keep left:

    Keep left to stay on B857.

    B857147 m

  84. Keep left:

    Keep left to stay on B857.

    B8571.1 km

  85. Turn left:

    Turn left onto Stirling Street.

    Stirling Street164 m

  86. Turn right:

    Turn right onto Burns Street.

    Burns Street259 m

  87. Turn left:

    Turn left onto Main Street/B857. Continue on B857.

    B857948 m

  88. Turn left:

    Turn left to take the A82 ramp.

    A821.6 km

  89. Roundabout:

    Enter Lomond Gate and take the 1st exit onto Stirling Road/A813.

    Lomond Gate15 m

  90. Leave roundabout:

    Exit the roundabout onto Stirling Road/A813.

    Stirling Road87 m

  91. Roundabout:

    Enter the roundabout and take the 2nd exit onto Stirling Road/A813.

    35 m

  92. Leave roundabout:

    Exit the roundabout onto Stirling Road/A813.

    Stirling Road54 m

  93. Keep right:

    Keep right to stay on Stirling Road/A813.

    Stirling Road559 m

  94. Keep right:

    Keep right to stay on A813.

    A81343 m

  95. Roundabout:

    Enter the roundabout and take the 2nd exit onto A813.

    35 m

  96. Leave roundabout:

    Exit the roundabout onto A813.

    A81334 m

  97. Turn left:

    Move left onto Stirling Road/A813. Continue on Stirling Road.

    Stirling Road925 m

  98. Roundabout:

    Enter the roundabout and take the 1st exit onto Strathleven Drive.

    15 m

  99. Leave roundabout:

    Exit the roundabout onto Strathleven Drive.

    Strathleven Drive256 m

  100. Turn right:

    Turn right onto Strathleven Park.

    Strathleven Park102 m

  101. Roundabout:

    Enter the roundabout and take the 3rd exit onto Stirling Road/A813.

    60 m

  102. Leave roundabout:

    Exit the roundabout onto Stirling Road/A813.

    Stirling Road150 m

  103. Roundabout:

    Enter the roundabout and take the 2nd exit onto Stirling Road/A813.

    31 m

  104. Leave roundabout:

    Exit the roundabout onto Stirling Road/A813.

    Stirling Road64 m

  105. Keep left:

    Keep left to stay on Stirling Road/A813.

    Stirling Road612 m

  106. Keep left:

    Keep left to stay on Stirling Road/A813.

    Stirling Road229 m

  107. Keep right:

    Keep right to stay on A813.

    A81342 m

  108. Roundabout:

    Enter the roundabout and take the 1st exit onto A813.

    21 m

  109. Leave roundabout:

    Exit the roundabout onto A813.

    A81347 m

  110. Keep right:

    Keep right to take Stirling Road/A813.

    Stirling Road231 m

  111. Keep left:

    Keep left to stay on Stirling Road/A813.

    Stirling Road129 m

  112. Keep left:

    Keep left to stay on Stirling Road/A813.

    Stirling Road253 m

  113. Roundabout:

    Enter the roundabout and take the 2nd exit onto Stirling Road/A813.

    35 m

  114. Leave roundabout:

    Exit the roundabout onto Stirling Road/A813.

    Stirling Road88 m

  115. Roundabout:

    Enter Lomond Gate and take the 3rd exit onto A82.

    Lomond Gate110 m

  116. Leave roundabout:

    Exit the roundabout onto A82.

    A8263 m

  117. Keep right:

    Keep right to stay on A82.

    A82756 m

  118. Take exit:

    Take the exit.

    A82810 m

  119. Turn right:

    Turn right onto Renton Road/A812. Continue on Renton Road.

    Renton Road715 m

  120. Keep right:

    Keep right to take B857.

    B8571.2 km

  121. Turn left:

    Turn left onto C6.

    C655 m

  122. Turn left:

    Move left onto Hillfoot.

    Hillfoot181 m

  123. Turn right:

    Move right.

    31 m

  124. Turn left:

    Turn left onto Red Row.

    Red Row83 m

  125. Turn right:

    Turn right onto Main Street/B857. Continue on B857.

    B8571.1 km

  126. Turn left:

    Turn left to take the A82 ramp.

    A821.6 km

  127. Roundabout:

    Enter Lomond Gate and take the 1st exit onto Stirling Road/A813.

    Lomond Gate15 m

  128. Leave roundabout:

    Exit the roundabout onto Stirling Road/A813.

    Stirling Road87 m

  129. Roundabout:

    Enter the roundabout and take the 2nd exit onto Stirling Road/A813.

    35 m

  130. Leave roundabout:

    Exit the roundabout onto Stirling Road/A813.

    Stirling Road54 m

  131. Keep right:

    Keep right to stay on Stirling Road/A813.

    Stirling Road559 m

  132. Keep right:

    Keep right to stay on A813.

    A81343 m

  133. Roundabout:

    Enter the roundabout and take the 5th exit onto A813.

    118 m

  134. Leave roundabout:

    Exit the roundabout onto A813.

    A813175 m

  135. Keep right:

    Keep right to take Stirling Road.

    Stirling Road783 m

  136. Roundabout:

    Enter the roundabout and take the 2nd exit onto Stirling Road/A813.

    30 m

  137. Leave roundabout:

    Exit the roundabout onto Stirling Road/A813.

    Stirling Road150 m

  138. Roundabout:

    Enter the roundabout and take the 2nd exit onto Stirling Road/A813.

    39 m

  139. Leave roundabout:

    Exit the roundabout onto Stirling Road/A813.

    Stirling Road1.3 km

  140. Turn left:

    Turn left onto Bridge Street.

    Bridge Street284 m

  141. Turn left:

    Move left onto B857.

    B857116 m

  142. Turn right:

    Turn right to stay on B857.

    B85739 m

  143. Keep right:

    Keep right to stay on B857.

    B857120 m

  144. Keep left:

    Keep left to stay on B857.

    B85770 m

  145. Turn left:

    Turn left.

    29 m

  146. Turn left:

    Turn left.

    118 m

  147. U-turn:

    Make a right U-turn.

    118 m

  148. Turn right:

    Turn right.

    29 m

  149. Turn left:

    Turn left onto Bank Street/B857.

    Bank Street298 m

  150. Turn left:

    Make a sharp left onto Main Street.

    Main Street331 m

  151. Turn left:

    Turn left onto Church Street.

    Church Street83 m

  152. Turn left:

    Turn left to stay on Church Street.

    Church Street121 m

  153. Turn right:

    Turn right.

    84 m

  154. Turn right:

    Turn right onto Church Street.

    Church Street4 m

  155. Turn left:

    Turn left to stay on Church Street.

    Church Street79 m

  156. Turn right:

    Turn right to stay on Church Street.

    Church Street83 m

  157. Turn right:

    Turn right onto Main Street.

    Main Street331 m

  158. Turn right:

    Make a sharp right onto Bank Street/B857. Continue on B857.

    B857553 m

  159. Turn left:

    Turn left onto Bridge Street.

    Bridge Street39 m

  160. Turn left:

    Turn left to stay on Bridge Street.

    Bridge Street236 m

  161. Turn right:

    Turn right onto A813.

    A813127 m

  162. Turn right:

    Turn right onto Main Street.

    Main Street328 m

  163. Turn left:

    Turn left onto Croft Street.

    Croft Street141 m

  164. Turn left:

    Turn left onto George Street.

    George Street109 m

  165. Turn left:

    Turn left onto Campbell Street.

    Campbell Street124 m

  166. Turn right:

    Turn right onto Main Street.

    Main Street204 m

  167. Turn left:

    Turn left onto A813.

    A813127 m

  168. Turn left:

    Turn left onto Bridge Street.

    Bridge Street284 m

  169. Turn left:

    Move left onto B857.

    B85793 m

  170. Turn left:

    Move left to stay on B857.

    B85775 m

  171. Keep left:

    Keep left to stay on B857.

    B857103 m

  172. Keep left:

    Keep left to stay on B857.

    B857210 m

  173. Turn right:

    Turn right onto Queens Drive.

    Queens Drive39 m

  174. Turn right:

    Turn right onto Main Street.

    Main Street111 m

  175. Turn left:

    Turn left onto Arthur Street.

    Arthur Street93 m

  176. Turn right:

    Turn right onto Queen Street.

    Queen Street120 m

  177. Turn right:

    Turn right onto Upper Bridge Street.

    Upper Bridge Street106 m

  178. Turn right:

    Turn right onto Main Street.

    Main Street276 m

  179. Turn left:

    Move left to stay on Main Street.

    Main Street7 m

  180. Turn left:

    Turn left onto Queens Drive.

    Queens Drive39 m

  181. Turn right:

    Turn right onto B857.

    B8573.5 km

  182. Keep right:

    Keep right to take A812.

    A812605 m

  183. Turn left:

    Turn left onto Glasgow Road/A814.

    Glasgow Road884 m

  184. Roundabout:

    Enter the roundabout and take the 4th exit onto Glasgow Road/A814.

    93 m

  185. Leave roundabout:

    Exit the roundabout onto Glasgow Road/A814.

    Glasgow Road342 m

  186. Roundabout:

    Enter the roundabout and take the 2nd exit onto Glasgow Road/A814.

    17 m

  187. Leave roundabout:

    Exit the roundabout onto Glasgow Road/A814.

    Glasgow Road647 m

  188. Turn right:

    Turn right onto Eastfield Crescent.

    Eastfield Crescent31 m

  189. Turn right:

    Turn right onto Burnside Place.

    Burnside Place81 m

  190. Turn left:

    Turn left to stay on Burnside Place.

    Burnside Place122 m

  191. Turn left:

    Turn left onto Eastfield Crescent.

    Eastfield Crescent68 m

  192. Turn left:

    Turn left onto Glasgow Road/A814.

    Glasgow Road645 m

  193. Roundabout:

    Enter the roundabout and take the 2nd exit onto Glasgow Road/A814.

    30 m

  194. Leave roundabout:

    Exit the roundabout onto Glasgow Road/A814.

    Glasgow Road353 m

  195. Roundabout:

    Enter the roundabout and take the 4th exit onto Church Street/B830.

    107 m

  196. Leave roundabout:

    Exit the roundabout onto Church Street/B830.

    Church Street64 m

  197. Keep left:

    Keep left to stay on Church Street/B830.

    Church Street16 m

  198. Turn left:

    Turn left onto Station Road.

    Station Road254 m

  199. Arrive:

    You have arrived at your destination.

Directions for the Dumbarton · Route 4 loop. Always drive to the road and conditions you see, not the list — signs, signals and other traffic take priority.

Local roads & landmarks

These are the real named features along the loop, straight from our route catalogue. Use them to recognise where you are and to anticipate the hazard each one brings, not to memorise a fixed order.

Junctions & roundabouts

Decide your lane and exit on the approach to each of these, get set up early.

  • Barloan Toll
  • Glasgow Road
  • Lomond Gate
  • Stirling Road

Stations

Expect busier traffic, pick-ups and pedestrians around these.

  • Dumbarton Central
  • Dumbarton East
  • Dalreoch

Schools

Watch for 20 mph zones, crossings and children near these.

  • Renton Primary School

Churches

Useful navigation anchors on the loop.

  • St Patrick's RC Church
  • Vale of Leven Baptist Church
  • St. Mungo's Episcopal Church

Pubs

Easy landmarks to navigate the loop by.

  • Fountain Tavern

Shops & parades

Frequent stop-start traffic and pedestrians, keep your speed down.

  • Subway
  • M & M Stores
  • Scotmid
  • John Kane Funeral Directors

Watch out for

  • Multiple roundabouts

    Approach in the correct lane, signal on the exit before yours, and keep checking your mirrors as you leave.

  • Dual-carriageway join

    About 8.7 km of this loop is dual carriageway. Build your speed on the slip road, take an effective rearward observation, and merge without forcing other traffic to brake.

  • Changing speed limits

    Limits change across this route (20, 30, 40, 60, 70 mph). Watch for repeater signs and adjust early, examiners mark you down for carrying the wrong speed into a new limit.

  • Residential streets

    Narrow residential roads mean parked cars, pedestrians and reduced visibility. Cover the brake, keep your speed down and be ready to give way.

Drive it: landmark by landmark

Navigate by these 20 catalogued landmarks rather than a memorised turn list, an indicative loop, not an official DVSA route.

  1. Barloan Toll

    Start near Barloan Toll.

  2. Dumbarton Central

    Continue to Dumbarton Central.

  3. Glasgow Road

    Continue to Glasgow Road, taking the junction with good observation.

  4. Dumbarton East

    Continue to Dumbarton East.

  5. Subway

    Continue to Subway.

  6. M & M Stores

    Continue to M & M Stores.

  7. St Patrick's RC Church

    Continue to St Patrick's RC Church.

  8. Lomond Gate

    Continue to Lomond Gate, taking the junction with good observation.

  9. Renton Primary School

    Continue to Renton Primary School.

  10. Scotmid

    Continue to Scotmid.

  11. Renton International Brigades Memorial

    Continue to Renton International Brigades Memorial.

  12. John Kane Funeral Directors

    Continue to John Kane Funeral Directors.

  13. O'Brien's

    Continue to O'Brien's.

  14. Vale of Leven Baptist Church

    Continue to Vale of Leven Baptist Church.

  15. Stirling Road

    Continue to Stirling Road, taking the junction with good observation.

  16. Betfred

    Continue to Betfred.

  17. Fountain Tavern

    Continue to Fountain Tavern.

  18. Leven Valley Trains

    Continue to Leven Valley Trains.

  19. St. Mungo's Episcopal Church

    Continue to St. Mungo's Episcopal Church.

  20. Dalreoch

    Finish back near Dalreoch, completing the loop.

More routes at Dumbarton test centre

Route FAQs

This route is 56.8 km and takes about 35 min to drive at a steady learner pace. It is an independent practice loop near Dumbarton test centre, not an official DVSA route.