Trains left la Gare du Sud in a Westerly direction before turning first North-West and then round to the south towards St. Philippe. The video below shows the first part of the route from Nice to Colomars (La Manda).
On the map below the site of the original Gare due Sud appears as a void in the right middle of the image with the present station to its West.
The two station sites are covered in the previous post in this series:
Before we finally leave the site of the two stations, modern and old, here are a few more images of the two stations and rolling stock at the site. The first image is the only one I have found which shows a steam locomotive leaving the old Gare du Sud.More photographs can be found by following the links in the reference section at the bottom of this post. Les tirages sont datés de Juillet 1983. Le jour exact n’a pas été retrouvé (c) Claude Villetaneuse. 1984 Autorail Billard en gare de Nice Chemins de fer de Provence.
Some amazing photos can be found on various french forums. The next four are from Les Trains de l’Histoire  and a thread which focusses on diesel motive power on the Nice-Digne Line.Further photographs can be found on a variety of websites.
After leaving the old station, trains remained within the station site for some distance. Rue Alfred Binet did not cross the old station site in those days. Trains then had at grade crossings at Rue Dabray, Rue Gutenburg and the junction of Boulevard Joseph Garnier and Boulevard Gambetta. The first small stop on the line was immediately after the road junction.Looking back towards the station from Rue Dabray.Looking ahead from Rue Dabray across Rue Gutenburg. Looking forward from Rue Gutenberg towards the Arrest Gambetta beyond the next road junction.Looking forward to the road Junction at Gambetta The road junction, Google Streetview.
Just beyond the small Station called Gambetta the line curved round under Boulevard Mantega Righi and then entered the tunnel at La Mantega – the tunnel Piol Mantéga.The tunnel was 350 metres long. The current Piol Mantéga Tunnel is the result of the joining of two older tunnels by a modern one of 174 metres in length. The two older tunnels were La Mantega Tunnel (88 metres long) closest to La Gare du Sud, and Piol Tunnel (78 metres long).
In addition, the entrance to the Piol tunnel was extended by a dozen meters towards Saint-Philippe in concrete. The images below are two views of the cutting between La Mantéga and Piol tunnels close to Saint Paul’s Church. The North portal of Piol Tunnel is visible as well as an aqueduct which carries a small stream over the tunnel. A picture of St. Paul’s Church follows the views of the works. The picture of the church is taken from over the old tunnel portal in the images immediately below.
The tunnel runs below the trees to the left of the church.In the photograph above the railway runs to the right of the road (Avenue Paul Arene) towards the next Station, another small halt called Nice-Parc Imperial which can be seen marked Arret on the right side of the map below.The line is shown below in the satellite image from Google Earth
The portal of the next tunnel, that of Saint-Philippe, is just visible in the bottom left of the satellite image. Details of this tunnel can be found on the Inventaire des Tunnels Ferroviaires de France website. Saint-Philippe Tunnel is 255 metres long, in it the line curves round from a south-westerly direction to a north-westerly direction. Leaving the tunnel the line immediately crosses Avenue d’Estienne d’Orves and enters another small halt.The halt of Nice-Saint-Philippe consists of no more than a small concrete platform and immediately precedes the entrance to the next tunnel, that of Saint Pierre. The tunnel was 633 metres long and as the black and white image below shows, trains immediately crossed two bridges after leaving the tunnel. The tunnel portal is marked with a yellow arrow. These last three pictures show the bridges along the hillside and are taken from across the valley. The pictures that follow show the approach to and the location of the next halt – La Madeleine.Chemin du Vallon Sabatier Passes under the railway to the immediate north-west of the station.As does Chemin de la Costière.The line continues North-west from La Madeleine Halt before swinging round to the West and crossing Boulevard de la Madeleine on an elegant viaduct.It then enters another tunnel – le Tunnel de Bellet (also known as le Tunnel de Saint Antoine). The tunnel is 950 metres long and straight enough to be able to see the far end from outside the near portal. The far portal, furthest from La Madeleine is interesting. Because of its proximity to the Italian border, the entrance to the tunnel was been equipped at its construction in 1892 with a fortified defence system. Six years later, in 1898, defences were reinforced by the introduction of a pit 4.2 metres long in front of the portal which in normal times was filled with sand. In times of war, it could either be emptied, or receive explosives to destroy the tunnel entrance if required.
The tunnel portal now sits just under the A8 and can be seen to the right of the satellite image below. The railway continues around the edge of the industrial complex at Cremat and a halt is provided to serve the area – Nice-Cremat-PAL.This was at one time the stop of Zygofolis details of which can be found in the last post in this series.  Slip-roads from the A8 now travel under the line using purpose built bridges.
In the picture above, Nice-St. Isidore station building can just be glimpsed to the left of the image. The approach along the line is shown below. The station building can just be glimpsed from the Chemin de Crémat.From St. Isidore, the line continues and turns to a more northerly direction and then switches back towards the North-West and crosses Chemin des Serres and Chemin de la Glacière before entering the complex at Lingostiere.
The first image of the depot at Lingostiere has been rotated to show the underpass flood channel at Chemin de la Glacière in the bottom left of the picture. Just to the North-West of this bridge the tracks fan out to serve the depot.The depot at Lingostiere was the main depot on the Nice to Digne Line. The workshops were created in 1975 before that the workshops were in Draguignan despite the closure of the Central Var line in 1949.
A variety of rolling stock and traction could be observed alongside the line out of Nice towards La Manda. Another photograph from Les Trains de l’Histoire, Sur les Chemins de Fer de Provence (Nice-Digne) shows the depot in 1979. T62 at Lingostière on 14th February 2007. 
The line leaves Lingostiere and passes under the M6202 dual carriageway before settling in alongside that road. The M6202 and the Chemin de Fer de Provence follow each other for some distance alongside the River Var.
The picture below shows the two running in parallel. The halt visible in the distance is Saint-Sauveur.
The next halt is Bellet.And the next is Colomars/La Manda. The satellite image below is of great interst to those who are following the original line of the railway. The modern line follows the River side and the M6202, the original line deviated to the East. The wide sweep of the line which branched off the Nice to Digne line can be seen curving round to the La Manda bridge. Even though the railway disappeared in the 1950s, its route is still visible in the layout of the roads at La Manda.A little less obvious because of the trees is the old alignment north of La Manda heading towards Digne-les-Bains. It can still be picked out on the next satellite image below and returns towards the river bank in the top right of the image. If your eyesight is really good you might just be able to make out the name of the road which follows the old line – Avenue du Train des Pignes.
The Ligne de Central Var left the Nice to Digne line at La Manda close to Colomars on the River Var. The station building at Colomars Station remains as evidence of the line. The line branched off the current Digne line just to the north of the hamlet of La Manda.
The station construction is typical of many of the stations still evident on the route of the line. A few historic postcards are reproduced here to give an idea of the station in the early years of the 20th century.
The second of these postcard views has been ‘adapted’ by Jean Giletta the photographer to include a hand drawn train. While it is a pity that the photographer did not wait for a real train to cross the bridge, the picture illustrates the nature of the river crossing. The railway line crossed the river on the top of the truss girders with provision between the trusses for road traffic!
- Ravnsbak.dk, Narrow gauge railway Nice Digne; http://www.ravnsbak.dk/Railways/France/Railcars/Narrow%20gauge%20railway%20Nice%20Digne/index.html#, accessed on 10th April 2018
- Les Trains de l’Histoire, Sur les Chemins de Fer de Provence (Nice-Digne); https://www.tdh-forum.fr/viewtopic.php?t=71551, accessed on 10th April 2018. Copy right for these images rest with the photographers …. the relevant names on that site are: chavance, michel/57, Gérard and there are some great photographs to enjoy there.
- Wikipedia, Chemins de Fer de Provence; https://en.wikipedia.org/wiki/Chemins_de_Fer_de_Provence, accessed on 10th April 2018; Flickr, Nice JHM-1980-0268 – France, Chemins de fer de la Provence, Nice; https://www.flickr.com/photos/jhm0284/14640888993, accessed on 10th April 2018; Flickr Hive Mind – The World’s Best Photos of x304; https://hiveminer.com/Tags/x304, accessed on 10th April 2018; Ruhn Feldt, Nice – Annot – Digne-Les-Bains; http://provence.jvgspv.se, accessed on 10th April 2018. The last link provides photographs along the full length of the Nice to Digne Line.
- http://www.rd-rail.fr, Railways of Provence: from Nice to Digne (June 15, 2016); http://www.rd-rail.fr/1-PHOTOS/PH43/index-ph43.html, accessed on 10th April 2018.
- Picture (c) Gerard on Forum: Les Trains de l’Histoire, accessed on 10th April 2018.
- Picssr, JHM0284’s Most Interesting Flickr Photos; http://picssr.com/photos/jhm0284/interesting/page9?nsid=15205793@N06, accessed on 11th April 2018.
- Picture (c) Michel/57 on Forum: Les Trains de l’Histoire, accessed on 10th April 2018.
- Inventaire des tunnels de ferroviaires de France, Tunnel du Piol Mantéga; http://www.tunnels-ferroviaires.org/tu06/06088.11.pdf, accessed on 11th April 2018.
- Inventaire des tunnels de ferroviaires de France, Tunnel du Piol Mantéga; http://www.tunnels-ferroviaires.org/tu06/06088.10.pdf, accessed on 12th April 2018.
- Inventaire des tunnels de ferroviaires de France, Tunnel du Piol Mantéga; http://www.tunnels-ferroviaires.org/tu06/06088.9.pdf, accessed on 12th April 2018.
- https://rogerfarnworth.wordpress.com/2018/04/06/nice-to-digne-les-bains-part-1-nice-chemins-de-fer-de-provence-57, there are also some excellent photographs of the trains and buses that served the theme park taken by Jean-Henri Manara; https://www.flickr.com/photos/jhm0284/albums/72157665103843167 accessed on 24th April 2018.
- Simplon Postcards, Chemins de Fer de Provence – CP, Page 1B: Rolling Stock – Diesel Locos & Trailers; http://www.simplonpc.co.uk/CPb.html, accessed on 12th April 2018.
- Alain Mionnet, Le Chemin de Fer de Provence; http://alain.mionnet.pagesperso-orange.fr/cfp.htm, accessed on 12th April 2018.
- https://commons.wikimedia.org/wiki/File:Autorail_Billard_212_des_CP_-_Juillet_1983-8.jpg, accessed on 12th April 2018.
- Taken in 1971/72 (c) Locky on Forum: Les Trains de l’Histoire, accessed on 10th April 2018.
- Inventaire des tunnels de ferroviaires de France, Tunnel du Piol Mantéga; http://www.tunnels-ferroviaires.org/tu06/06088.8.pdf, accessed on 12th April 2018