In permanent-way terminology, a scissors crossover comprises one diamond crossing together with how many turnouts?

Introduction / Context:
A scissors crossover is a compact track arrangement used where space is limited but operational flexibility is required. It allows trains to cross from one track to the other in either direction within a short length, commonly found in station throats and busy junction approaches.

Given Data / Assumptions:

• Definition focuses on the constituent special trackwork elements.
• Diamond crossing provides the physical track intersection.
• Turnouts provide the route divergence for crossovers.

Concept / Approach:

A scissors crossover is essentially two crossovers overlapped: one left-hand and one right-hand, interlaced through a diamond crossing. Each crossover requires two turnouts. Therefore, two crossovers together require four turnouts, plus the single diamond where the running rails intersect.

Step-by-Step Solution:

Verification / Alternative check:

Standard plan drawings show four sets of switch-tongue/stock-rail assemblies for the two opposing movements, in addition to the central diamond.

Why Other Options Are Wrong:

One, two, or three turnouts cannot form both crossovers; “no turnout” is incorrect since switches are essential for route setting.

Common Pitfalls:

Confusing a scissors crossover with a simple diamond (no routing choice) or with a single crossover (only one direction of transfer).

Final Answer:

Four turnouts