Why is the length of passenger train in indian railways limited to 24 coaches?

 It is a very interesting question. Few of the writers mentioned that it depends on the loop line but its not true as Indian Railways operates freight trains and Passenger trains both on the same tracks and loop lines are constructed by keeping in mind of a freight train which is generally a 60 wagon train so loop lines can easily handle a 24 or 28 coach passenger train.

Let us know why the length of the passenger trains in India is limited to 24 coaches:-

1. Indian locomotives can pull maximum of 24 coaches easily to run at MPS( max. permissible speed). If the number of coaches will be incrrased , acceleration will be slow and train will take more time to reach at mps. That is why most of the trains running at 130 kmph or above have 16–20 coaches only ( excluding exception). Passenger train locomotives are specially designed for the speed.

Note: WAP-5 & WAP-7 locomotives are well known for the speed and used in passenger trainswhereas WAG-9 is for tractive effort and used in Freight trains ( off links excluded).

2. Length of the platforms is designed to handle 24 coaches only .Few major stations have platforms for 26–28 coaches but majority are made for 24 coaches only.

These two are the major factors responsible for this cap of 24 coaches but it doesn’t like running 25 or 26 coaches will effect alot.

Image source: Google

How does a train find its tracks while more tracks are present?

 Well. Your question is based on the following image, let's assume.

Woah! Many tracks, right. So, let's understand the mechanism of a train changing tracks on a primary level first. And for starters, Locopilots have nothing to do with Track Switching. They just have to obey the speed limits to ensure a safe journey.

This is a common misconception that this kind of steering wheel directs the train into branches of tracks. This is used for a different purpose which is a question for another time.

This is a simple one. Let's start with this. We'll be coming back to image frequently in this answer for gaining more clarity whenever required.

Some preliminary knowledge is required for understanding the mechanism. This knowledge concerns the wheels of railway units(locomotive, coaches etc.).

Out of the three parts the Flange (the projection like structure out of the wheels) decides the direction of train. The Flanges help the train to travel on curves and also help in the track switching process.

The trajectory of the wheel on curves is the answer for different question and is for another time. For now, let's concentrate on the Track-Switching fun.

Now, in the second image of this question, a track is dividing into two. The track is adjusted for the trains such that they travel on the right branch. This can be explained in a simple way using Flanges of the wheel.

Carefully observe the second image. At the joint, the right side has a small gap. And on the left side, there is none. I'm going to clarify it more with the following image.

See the Yellow circle: The small gap allows the flange of the wheel into it.

See the green rectangle: The emerging track is attached to the source track. As the flange of left wheel, which remains inside of the track, (considering the train is moving into the plane of the picture) has no gap, the attached rail track guides it onto the right branch.

As everything is associated with some technical nomenclature, let's learn that now and we'll discuus the rest of the answer in technical terms while we learn the process of the track switching.

Stock Rails: These tracks/rails don't involve any kind of crossings and can be understood as parent track.

Point: (Earlier referred to as Joint) These are the movable rails which guide the wheels towards either the straight or the diverging track. They are tapered on most switches.

Switch Motor: This motor controls the switch rod between the points. This can be understood like more of gearbox. This is usually controlled by the Station Master. Pointsmen deal with the manual problems related to these points and motor.

Closure Rail: These rails guide the train into a new branch.

Guard Rail: These rails protect the train from derailing of the train. Soon after the train crosses the frog rails, these rails support the wheels to stay on the stock rails that follow.

Frog Rail: This is an X shaped rail intersection at every point.

Now correlate the above image with the second image. From the switch rod POV, the train is moving to the right of the picture and moves into the non-horizontal branch. At the point the right wheel is directed onto the new track. At the frog rails, the flange of the left wheel comes completely onto the new track. (Before the frog rails, the direction of the wheel is altered. The wheel doesn't come onto the new track).

Now again, let's go to the second picture. You'll be able to distinguish all the parts mentioned above.

If in case any stones or any living beings like rats and snakes get stuck in between the point, the pointsman immediately notifies this to the SM and he changes the home signal to Red, and possibly the distant signal to Yellow. So, the trains enter the station safely on the right track after the repairs are done.

The same operation is carried out extensively in case of first image. The station master of such railway station remains alert all the time and maintains the entrance and exit of various trains into and from the station.

What are heritage trains in Indian Railways, and where do they run?

 Heritage Train or heritage special train is a preserved train in Indian railways which is specialized for tourist-focused service designed to showcase India’s rich railway history, operating on scenic nature or historically significant routes.

Also known as Toy train, Indian railways operates them on Mountain region, these routes were tough to electrify/convert into broad gauge due to heavy Ghat section. less space to replace with new tracks

Top 3 Toy train routes designated by UNESCO world heritage site under the mountain railways of India

⭐Some of the examples of toy train route top 3

Mettupalayam- Udagamandalam (Ooty) toy train via coonoor, operated by Nilgiri Railways

The only Meter Gauge train route in Tamilnadu.

Darjeeling-New Jalpaiguri toy train

operated Darjeeling Himalayan Railway in West Bengal

Kalka -Shimla Toy train.

Kangra Valley and Matheran Hill Railway are on the tentative list of UNESCO world Heritage Site.

Pathankot-Jogindar Nagar Kangra Valley line

Neral-Matheran Hill Railway in Maharashtra

Length of the Narrow Gauge track is approx 600–762 mm

⭐Indian Railways also operates Steam Heritage Special train between Ahmedabad and Ekta Nagar Kevadiya (Statue of Unity) to showcase steam engine vibe with power supply via electric pantograph.

It features 4 AC Vistadome-type coaches and a specially designed restaurant car, designed for a luxurious, modern-vibe, yet nostalgic experience.

It's a broad gauge train.

Which is the longest distance covering train within Karnataka?

 17307/Mysore-Bagalkot Basava Express is the longest distance covering train within Karnataka which takes 1020 km, by 21hr 30 min time

It is a South Western Railway Zone train, interesting fact is it passes through 2 state (Andhra Pradesh and Maharashtra (Solapur) to reach Bagalkot in Karnataka.

I think so no train can make this much record covering 1000 km plus distance within Karnataka

Next 2nd long distance train is 16566/Mangalore Central-Yesvantpur Weekly Express which takes 833 km when shorter route is 363 km

Travel Duration:- 16 hr 53 min

This train acts as a alternative train because of its route, its goes via Palakkad, Salem, Krishnarajapuram instead of Ghat section route via Subramanya Road, Hassan Route.

Very less popular train among Mangalore to Bangalore section.

3rd Train is 16592/Mysore Hubli Hampi Express via Guntakal

Travel Duration:- 15 hr 30 min and 679 km via Bangalore, Guntakal, Hospete when shorter route is 473 km.

Very useful train for Hampi going tourist destination from Mysore and also Ballary, Gadag.

4th long distance train is 16227/Mysore-Talguppa Express via Ksr Bengaluru

It takes 12 hours approx, and covers 508 km when shorter route is 373 km

It's a overnight train between Mysore and Talguppa, slow journey, but peacefully able to sleep.

What is the most difficult part of developing a high-speed train system?

 California approved a $33 billion high-speed rail line in 2008. Seventeen years later, the cost has tripled—and not one passenger has boarded a train.

The engineering of fast trains is, remarkably, the easy part. The truly brutal challenge is acquiring the land to put them on.

Right-of-way acquisition is the single most underestimated obstacle in building high-speed rail, particularly in developed, densely populated countries. High-speed trains require extremely gentle curves — a 350 km/h train needs a curve radius of about 7,000 meters — and very modest grades, typically no more than 3–4%. That means the route can't just snake around obstacles the way a highway might. It needs long, straight corridors through landscapes already carved up by private property, existing infrastructure, and environmental protections.

This creates a cascade of difficulties:

• Thousands of individual land parcels must be negotiated or condemned through eminent domain. Each parcel can involve legal challenges, appraisals, holdouts, and political blowback. In California, acquiring land for just the initial Central Valley segment involved more than 2,000 parcels and years of litigation.
• Urban entry points are the worst bottleneck. A high-speed line is only useful if it connects city centers, but that's exactly where land is most expensive and most contested. Tokyo's Shinkansen, built in the early 1960s, succeeded partly because postwar Japan had both the political will and the legal framework to clear corridors quickly — conditions that rarely exist in contemporary democracies.
• Environmental review layers on additional years. In the United States, the National Environmental Policy Act (NEPA) process alone can take a decade for a major rail project, as every alignment alternative must be studied for impacts on wetlands, endangered species, historic properties, and noise.

Countries that have built high-speed rail successfully tend to share certain advantages. France's TGV network benefited from a centralized planning authority and vast stretches of low-density agricultural land. China's system — now over 45,000 km, the world's largest — was built under a governance model where land acquisition timelines are measured in months, not decades. Japan and Spain invested heavily during windows of strong political consensus.

The engineering challenges are real but well understood: slab track design, catenary power systems, signaling, tunnel boring, and earthquake resilience all have proven solutions refined over sixty years of global experience. What doesn't have a proven solution — at least not in many Western democracies — is the institutional and political machinery needed to assemble a corridor and keep a project funded across multiple election cycles.

That institutional gap, more than any question of physics or engineering, is why so many high-speed rail proposals stall or die.

Which is the cheapest train in India?

 In terms of faster, budget friendly and alternative train option then Jan Shatabdi Express is the cheapest Day TimeTrain in Indian Railways.

There are several reasons,

1.Jan Shatabdi is Same concept as of Shatabdi And Vande Bharat Express, but cuts off luxury features, with affordable price

Example: Vande Bharat Express and Jan Shatabdi Express On routes like Mumbai–Madgaon, even if multiple semi-high-speed trains run, their top speeds remain similar due to constraints of the Konkan Railway (ghat sections and single-line track).

If the Vande Bharat Express cannot significantly improve average speed on a route, its advantage becomes limited; trains like the Jan Shatabdi Express can offer a comparable journey time with fewer stops, and even provide a better scenic experience through Vistadome coaches.

Not defaming Vande Bharat train, every train has its advantage and Disadvantage.

2.Budget friendly option:- Ticket is cheaper, usually Below Rs 400–500 range when compared to Shatabdi/Vande Bharat Express fare which is around 800–1000

Example:- from Mumbai to Madgaon, Vande Bharat fare is around Rs 1600 and Jan Shatabdi fare is 300, so that's the reason this train is commonly known as Common Man’s Shatabdi, Economical version

3. More seating density:- Jan Shatabdi usually has: More Second Seating (2S) coaches (cheapest class)

Whereas Shatabdi/Vande Bharat has Mostly AC Chair Car which is quite expensive for Middle class families, so it is best alternative faster train

Higher passenger capacity = cost per passenger goes down.

When Intercity Express gets wait listed then Jan Shatabdi acts as a backup option train.

Exterior Of Non AC Chair Car (2S)

Ac Chair Car Jan Shatabdi

Interior of Jan Shatabdi Express (2S) Reserved Non AC Chair Car

Interior of Ac Chair Car

4. Priority netwrok:-Slightly lower priority than Shatabdi/Vande Bharat, While still fast, Jan Shatabdi may have a few more stops, Even if it has low priority, it gets high priority when compared to Intercity, Express And passenger trains,

So it’s fast, but not the absolute top-tier speed category.

5. Designed for middle-class affordability:- Indian Railways created Jan Shatabdi to bridge the gap between Expensive premium trains Shatabdi/ Vande Bharat Express and Regular express trains

So it targets people who want speed, without paying for luxury., but not slower than Intercity Trains.

Great advantage is it doesn't have General Coach (unreserved) which is good move to reduce the crowd. So Jan Shatabdi is best option for 4 families, students and ladies.

Only disadvantage is seat comfort, which is bench type in recent LHB coaches, not fully AC coaches, Few more stops and several features missing in which Vande Bharat/Shatabdi Express have.

And there is no food options, passengers have to bring their own food from outside.

So overall Jan Shatabdi Express is Cheapest Faster train in India, but lower priority than Shatabdi,

Which is the best train route in India?

 I have travelled many places in India and most of them through the Rail. The best Rail route which I have come across, was the Pamban Bridge. I have got a fair bit of reason for this.

1.Sea on the side of rail network(both sides).

2.The railway bridge is 6,776 ft (2,065 m) long and was opened for traffic in 1914. The scenery which you will see through the journey of 10 minutes will be full of excitement and you will cherish it for the rest of your life.

3.The road route from the Peninsular India to the Rameshwaram (Island) will add to the scenary. Many people would come to the side of the road and see the train passing by.

4.You can also see the view from above later on. But for that you have to travel 10 km from Rameshwaram to the side of the Island. It looks like this.

5. It is the the only rail route over sea in india.

6.Whenever the ships passes by. The bridge is opened like this.(only at one point in the middle of the route .

This shows that Pamban Bridge is one of the best train routes in India and one of the oldest too .

What is India's first driverless metro train?

 India's first driverless metro was started from Delhi operating on the 37-kilometer long Magenta Line between Janakpuri West and Botanical Garden and inaugurated by Prime Minister Narendra Modi on 28th December 2020,

Technology were used in train, Communication-Based Train Control (CBTC) and GoA 4 (Grade of Automation 4) technology, allowing for automatic wake-up, operation, and diagnostics without train operator or motorman to efficiently run service smoothly.

Then in South India, Bangalore Metro train started operating with driverless technology from Bommasandra to RV Road via Silk Board Yellow Line, 3rd metro line after the violet and green line.