A4146 Road Bridge carries the M4 motorway over the Grand Union Canal (Grand Junction Canal - Main Line - Gayton to Brentford) three miles from Boggin.
Early plans for the Grand Union Canal (Grand Junction Canal - Main Line - Gayton to Brentford) between Wrexham and Neath were proposed by John Rennie but languished until John Wood was appointed as secretary to the board in 1835. Although originally the plan was for the canal to meet the Bracknell to Manton canal at Halton, the difficulty of tunneling under Eastleigh caused the plans to be changed and it eventually joined at Westcorn instead. Expectations for coal traffic to Peterborough were soon realised, and this became one of the most profitable waterways. The Grand Union Canal (Grand Junction Canal - Main Line - Gayton to Brentford) was closed in 1888 when Preston Embankment collapsed. Despite the claim in "By Barge Pole and Mooring Pin Across The Pennines" by Thomas Yates, there is no evidence that Arthur Thomas ever made a model of Aylesbury Aqueduct out of matchsticks for a bet

There is a bridge here which takes a major road over the canal.
| Leighton Rubbish Disposal | 1 mile, 1 furlong | |
| Leighton Linslade Visitor Moorings | 1 mile, ½ furlongs | |
| Mardle Road Footbridge | 7 furlongs | |
| Mentmore Gardens Footbridge | 5½ furlongs | |
| Grovebury Road Footbridge No 115C | 3 furlongs | |
| A4146 Road Bridge | ||
| Grove Lock Arm | 1½ furlongs | |
| The Grove Lock PH | 1¾ furlongs | |
| Grove Lock No 28 | 1¾ furlongs | |
| Grove Lock Marina | 2¼ furlongs | |
| Church Lock Bridge No 116 | 6 furlongs | |
Amenities nearby at Grovebury Road Footbridge No 115C
- Grand Union Canal Walk — associated with Grand Union Canal
- An illustrated walk along the Grand Union Canal from London to Birmingham
- THE GRAND JUNCTION CANAL - a highway laid with water. — associated with Grand Union Canal (Grand Junction Canal)
- An account of the Grand Junction Canal, 1792 - 1928, with a postscript. By Ian Petticrew and Wendy Austin.
- The Boatmen's Institute in Brentford — associated with Grand Union Canal (Grand Junction Canal - Main Line - Gayton to Brentford)
Mouseover for more information or show routes to facility
Nearest water point
In the direction of Gayton Junction
In the direction of Thames - Grand Union Canal Junction
Nearest rubbish disposal
In the direction of Gayton Junction
In the direction of Thames - Grand Union Canal Junction
Nearest chemical toilet disposal
In the direction of Gayton Junction
In the direction of Thames - Grand Union Canal Junction
Nearest place to turn
In the direction of Thames - Grand Union Canal Junction
In the direction of Gayton Junction
Nearest self-operated pump-out
In the direction of Gayton Junction
In the direction of Thames - Grand Union Canal Junction
Nearest boatyard pump-out
In the direction of Thames - Grand Union Canal Junction
In the direction of Gayton Junction
There is no page on Wikipedia called “A4146 Road Bridge”





![The Winding Hole below Grove Lock (No 28). [[1519086]]At this point a stream enters the canal, and the quantity of water than can enter here is such that there is a warning that there could be a cross current. It would seem that beyond this point the problems caused by the limited water supply at Tring Summit no longer apply.The Leighton Buzzard bypass bridge can be seen in the distance.Back: [[1519091]]Next: [[1519096]]See also [[171952]]. by Chris Reynolds – 27 September 2009](https://s0.geograph.org.uk/geophotos/01/51/00/1510036_81c3e6f7_120x120.jpg)

![The Mobile Smithy on the Grand Union Canal. [[1519086]]This combination of a residential narrow boat, and the butty converted to a smithy, travels up and down the canal, with its wares put out for sale along the footpath.Back: [[1519096]]Next: [[1519086]] by Chris Reynolds – 27 September 2009](https://s3.geograph.org.uk/geophotos/01/51/91/1519107_51a1acf6_120x120.jpg)

![Narrowboats “up the Creek”. [[1519086]]The creek where the stream enters is wide enough to hold two narrowboats, and there is an adjacent work yard.Back: [[1510036]]Next: [[1519107]] by Chris Reynolds – 27 September 2009](https://s0.geograph.org.uk/geophotos/01/51/90/1519096_5716073a_120x120.jpg)
![The Waterways Service Barges “Wendover” and “Blaby”. [[1519086]]These are two of the specialist service barges used by British Waterways to maintain the canal.Back: [[1519086]]Next: [[1510036]] by Chris Reynolds – 27 September 2009](https://s3.geograph.org.uk/geophotos/01/51/90/1519091_729ce8d9_120x120.jpg)
![Grand Union Canal – North of Lock 28. Travel along the Grand Union Canal.The Tour along the canal starts hereSouth: [[1510049]].This is a view from Lock 20 looking towards Leighton Buzzard, the canal continuing north toward Milton Keynes and the River Ouse, which flows into the North Sea at the Wash, the Canal continuing towards the Midlands.Have a look at related pictures. The Sign is that of the lock-side public house [[1510056]].In the basin immediately below the lock two British Waterways service boats are moored [[1519091]]. Immediately beyond them a stream enters the canal and there is a winding hole [[1510036]]. Two narrow boats are moored in the entrance to the stream. [[1519096]].The red narrowboat moored just beyond the winding hole is a mobile smithy [[1519107]].In the distance the canal passes under the Leighton Buzzard bypass. by Chris Reynolds – 27 September 2009](https://s2.geograph.org.uk/geophotos/01/51/90/1519086_1ea69af8_120x120.jpg)




![The Beer Garden, Grove Lock Public House, Near Leighton Buzzard. For other views of the public house see [[1510056]]. by Chris Reynolds – 27 September 2009](https://s0.geograph.org.uk/geophotos/01/51/97/1519772_0edb0e03_120x120.jpg)
![Passing Lock No 28 – Narrowboat Lynx (2) – Waiting for the lock to fill. [[1510049]].Back: [[1519871]]. Next: [[1519880]]. by Chris Reynolds – 27 September 2009](https://s2.geograph.org.uk/geophotos/01/51/98/1519874_5fe5990f_120x120.jpg)
![Water junction. Just north of Grove Lock this is where a brook which has flowed from beyond Wing via Ledburn (see [[97102]]) joins the Grand Union canal helping to keep the canal in water. by Rob Farrow – 18 May 2006](https://s0.geograph.org.uk/photos/17/19/171952_b0e50c62_120x120.jpg)
![Passing Lock No 28 – Two Kayaks (1) - Approaching the bottom gates. [[1510049]].Back: [[1519812]]. Next: [[1519829]]. by Chris Reynolds – 27 September 2009](https://s2.geograph.org.uk/geophotos/01/51/98/1519822_55093d5b_120x120.jpg)
![Passing Lock No 28 – Two Kayaks (2) – On to the bank. [[1510049]].Back: [[1519822]]. Next: [[1519840]]. by Chris Reynolds – 27 September 2009](https://s1.geograph.org.uk/geophotos/01/51/98/1519829_c6ed01b3_120x120.jpg)
![Passing Lock No 28 – Two Kayaks (3) – On the run. [[1510049]].Back: [[1519829]]. Next: [[1519846]]. by Chris Reynolds – 27 September 2009](https://s0.geograph.org.uk/geophotos/01/51/98/1519840_7160bd75_120x120.jpg)
![Passing Lock No 28 – Narrowboat Ellesmere (1) – Approaching the lock. [[1510049]].Note the beer garden of the Grove Lock public house [[1510056]].Back: [[1519846]]. Next: [[1519858]]. by Chris Reynolds – 27 September 2009](https://s3.geograph.org.uk/geophotos/01/51/98/1519851_f58a4a18_120x120.jpg)
![Passing Lock No 28 – Narrowboat Ellesmere (2) – Passing through the bottom gates. [[1510049]].Note the well build brick steps on both sides of the lock entrance.Quite a few narrowboats have dogs on board.Back: [[1519851]]. Next: [[1519861]]. by Chris Reynolds – 27 September 2009](https://s2.geograph.org.uk/geophotos/01/51/98/1519858_93af895a_120x120.jpg)
![Passing Lock No 28 – Narrowboat Lynx (1) – Entering the lock. [[1510049]].Back: [[1519868]]. Next: [[1519874]]. by Chris Reynolds – 27 September 2009](https://s3.geograph.org.uk/geophotos/01/51/98/1519871_452a03fa_120x120.jpg)





